The easiest tax policy to understand is also one of the hardest to execute.
Tax the rich.
It sounds obvious. Billionaires own more wealth than entire cities, states, and sometimes small countries. Their fortunes rise with asset prices. Their lifestyles are funded by stock, debt, trusts, foundations, partnerships, and structures that most ordinary taxpayers will never touch. Meanwhile, governments struggle to fund healthcare, schools, infrastructure, pensions, housing, and basic public services.
So when someone proposes a tax on billionaire wealth, the emotional logic is simple.
They have the money. The public needs the money. Take some of the money.
California is now testing that logic in a very direct way. A proposed ballot measure would impose a one-time 5% tax on California billionaires, aimed at raising tens of billions of dollars for healthcare, education, and food assistance. According to the California Legislative Analyst’s Office, the tax would apply to billionaires living in California on January 1, 2026, with payment due in 2027 and an option to spread payments over five years.
On paper, it looks powerful. A small number of people. A huge tax base. A clear public purpose.
But that is where the simplicity ends.
Because billionaire wealth is not like a salary. It is not sitting neatly in a bank account. It is often locked inside company shares, private businesses, real estate structures, trusts, investment partnerships, and unrealized gains. It can move. It can be borrowed against. It can be discounted. It can be litigated. It can be shifted across borders. And when governments try to tax it directly, the rich do not just write checks.
They hire lawyers.
They move assets.
Sometimes, they move themselves.
That does not mean billionaires should not be taxed more. It means the better question is not whether the rich should pay more. The better question is: what kind of tax can the rich not easily escape?
California’s Billionaire Tax Is the Right Hook, But Not the Whole Story
California’s billionaire tax is attention-grabbing because it turns an abstract debate into a concrete proposal.
The state has a visible billionaire class. It has enormous public spending needs. It also has a political culture where inequality, technology wealth, housing costs, and public services are constantly colliding.
The proposed tax would target residents with a net worth above $1 billion. Proponents estimate that it could raise around $100 billion, with most of the revenue directed toward healthcare and the rest toward education and food assistance. CalMatters reports that the measure would apply to roughly 200 billionaires and could be paid in installments over five years.
The appeal is not hard to see.
A person worth $10 billion would still be worth billions after paying the tax. A state facing a budget shortfall could fund real programs. Voters frustrated by inequality could feel that the system is finally asking more from people who have gained the most.
But California also shows why wealth taxes are so difficult.
The Legislative Analyst’s Office warned that the revenue estimate is highly uncertain because billionaire wealth changes with financial markets and because some billionaires may leave the state. It also noted that if wealthy residents move away, California could lose future income-tax revenue.
That is the central tension.
A wealth tax looks strongest when you calculate it on a spreadsheet. It looks weaker when the people being taxed can change their behavior.
And billionaires can change their behavior more easily than almost anyone else.
They can move residency. They can restructure ownership. They can challenge valuations. They can delay transactions. They can lobby for exemptions. They can shift future investment somewhere else.
So California should not be treated as a simple story of courage versus greed. It is a case study in tax design.
The moral argument may be easy.
The mechanics are not.
Why Billionaires Can Be Rich Without Looking Taxable
Most people experience money through income.
They work. They get paid. Their employer reports that income. Taxes are withheld. The government can see the money before the worker even receives it.
Billionaires live in a different financial universe.
Their wealth usually comes from ownership. A founder owns shares in a company. A family owns a private business. An investor owns partnership interests. A real estate dynasty owns property through layers of entities. The value of those assets can rise by billions without producing taxable income.
This is the key distinction: wealth is not automatically income.
If a billionaire owns stock that rises from $10 billion to $20 billion, their wealth has doubled. But in many tax systems, including the United States, that gain is generally not taxed until the asset is sold. Until then, it is an unrealized gain.
That creates a strange result.
A nurse, teacher, engineer, or doctor pays tax every year because their money arrives as wages. A billionaire can become vastly richer in the same year while reporting much less taxable income, because their gain is sitting inside an asset they have not sold.
This is why the debate around billionaire taxation often sounds confusing. One side says billionaires are incredibly rich. The other side says they do not necessarily have taxable income.
Both can be true.
A 2025 NBER working paper on U.S. billionaires estimated that the top 0.0002% of households — roughly the Forbes 400 — paid an average effective tax rate of 24% in 2018–2020 when taxes were measured against economic income, compared with 30% for the full population and 45% for top labor-income earners.
That is the problem wealth-tax advocates are trying to solve.
The tax system is built around realization. Billionaire wealth is built around appreciation.
The two do not line up.
What a Wealth Tax Tries to Fix
A wealth tax tries to close that gap directly.
Instead of waiting for the billionaire to sell assets, it taxes the value of the assets themselves. If someone owns $10 billion of wealth, the government does not wait for income. It taxes the fortune.
This has a certain elegance.
It says: if your economic power has grown, your tax obligation should grow too.
It also avoids one of the biggest weaknesses of income taxation. A billionaire can choose when to sell shares. They can borrow instead of selling. They can hold assets until death. They can structure their affairs so that taxable income is much smaller than actual economic gain.
A wealth tax tries to make those strategies less effective by saying the asset itself is the tax base.
That is why it appeals to people who look at the modern economy and see a rigged system. They see people working for wages being taxed automatically, while billionaires accumulate wealth through stocks, private companies, and trusts. They see public services deteriorating while private fortunes rise.
A wealth tax feels like a direct correction.
And in theory, it can be.
If designed well, a wealth tax can raise revenue, reduce extreme concentration of wealth, and make the tax system less dependent on whether billionaires voluntarily realize gains.
But in practice, the phrase “if designed well” carries a lot of weight.
Because taxing wealth requires the government to answer questions that income tax often avoids.
What is the exact value of a private company?
What is the exact value of a minority stake in a family business?
What is the value of artwork, venture investments, carried interests, crypto holdings, trusts, and assets held through complicated ownership structures?
What happens if the asset value rises one year and crashes the next?
What happens if the taxpayer is rich on paper but does not have the cash to pay?
These are not small administrative details. They are the whole game.
Why Wealth Taxes Are So Hard to Make Work
The strongest argument against wealth taxes is not that billionaires deserve protection.
It is that wealth is hard to tax cleanly.
Start with valuation.
Publicly traded stock is easy to value. You can look up the market price. But many billionaire fortunes are not that simple. They may involve private companies, closely held shares, real estate entities, intellectual property, partnership interests, or assets without a daily market price.
If the government says a private company is worth $10 billion, the owner has every incentive to say it is worth $5 billion. They can hire experts. The government can hire experts. The case can end up in court. The final tax bill may depend less on economic reality and more on legal endurance.
Then there is liquidity.
A founder may be worth billions because their company is valuable. That does not mean they have hundreds of millions of dollars sitting in cash. A large wealth-tax bill may force them to sell shares, borrow money, or sell part of the business.
Sometimes that is fine. Billionaires are not helpless.
But sometimes forced selling can create distortions. It can push founders to sell at bad times. It can create pressure on private companies. It can make investors worry that ownership stakes will be liquidated for tax reasons rather than business reasons.
Then there is migration.
A wage earner tied to a job, family, school district, and mortgage cannot easily move jurisdictions to reduce taxes. A billionaire often can. They may already have homes in multiple states or countries. Their lawyers can plan residency. Their businesses may operate globally. Their wealth can be owned through entities that are easier to shift than ordinary income.
This does not mean every billionaire leaves. Many do not. Some care about talent networks, family, lifestyle, climate, culture, or business ecosystems more than tax rates.
But enough movement can matter.
That is why wealth-tax design has to account for behavior. A tax does not operate on a frozen world. It changes the world it enters.
The OECD’s review of wealth taxes captures this problem. In 1990, 12 OECD countries had individual net wealth taxes. By 2017, only four still did. The OECD notes that repeals were often justified by administrative and efficiency concerns, as well as doubts about whether the taxes achieved their redistributive goals.
That history should not be used lazily. It does not prove that every wealth tax is doomed.
But it does prove that wealth taxes are not magic.
They need careful design, strong enforcement, broad coverage, exit rules, valuation systems, and political durability. Without those, they can become narrow, leaky, expensive, and easier for the ultra-rich to avoid than for the merely wealthy to comply with.
What California’s Proposal Gets Right
California’s proposal gets one big thing right: it focuses attention on the difference between wealth and taxable income.
That matters.
The richest people in a society do not always show up as the highest-income taxpayers in the way ordinary people expect. Their fortunes may grow through unrealized gains. Their consumption may be funded through borrowing. Their estate planning may push assets into structures designed to minimize tax at death.
So a proposal that says “look at net worth, not just income” is addressing a real weakness in the tax system.
The California measure also has political clarity. It does not pretend that everyone must pay a little more. It targets people with extraordinary fortunes. That makes the public argument easier to understand: the tax is not aimed at doctors, small business owners, or upper-middle-class professionals. It is aimed at billionaires.
There is also a fairness argument that should not be dismissed.
If someone builds a billion-dollar fortune in California, they did not do it in a vacuum. They benefited from public universities, courts, infrastructure, legal protections, immigration systems, research funding, consumer markets, and a technology ecosystem built over decades.
Private genius may create a company.
But public systems make that company possible.
A billionaire tax is partly a claim that extreme private wealth carries a public obligation.
That claim is not radical. Every tax system already accepts it in some form. The real debate is where the obligation should fall and how it should be collected.
What California’s Proposal Risks
California’s proposal also risks showing why blunt wealth taxes can disappoint.
The first risk is revenue uncertainty.
A one-time tax on a small number of highly mobile people is not a stable fiscal foundation. Asset prices move. Billionaire residency can change. Valuations can be disputed. Legal challenges can delay or reduce collections. Even if the tax raises a large amount once, it does not necessarily solve recurring budget pressures.
The second risk is economic signaling.
California already depends heavily on high-income taxpayers. If billionaires and founders believe the state is willing to impose large retroactive or quasi-retroactive wealth taxes, some may treat that as a warning about future policy. That does not mean every entrepreneur flees the next morning. But tax policy affects expectations, and expectations affect where people build, invest, and reside.
The third risk is legal and administrative complexity.
A tax on net worth requires rules for what counts, what does not count, how assets are valued, how disputes are resolved, and what happens when people move. Every exclusion creates planning opportunities. Every valuation rule creates a fight. Every loophole becomes an industry.
The fourth risk is political overpromising.
If voters are told that a billionaire tax will fix healthcare, education, and food assistance, the measure may become a symbol of justice rather than a realistic fiscal instrument. If the revenue disappoints, opponents will say the whole idea of taxing the rich failed, even if the real problem was the particular design.
That would be unfortunate, because there are better ways to tax extreme wealth.
They are less dramatic than a wealth tax.
But they may be harder to escape.
Better Target 1: Tax Borrowing Against Billionaire Assets
One reason billionaires can avoid taxable income is that they do not always need to sell assets to spend money.
They can borrow against them.
Imagine a founder with billions of dollars in company stock. If she sells shares, she may owe capital-gains tax. But if she pledges those shares as collateral and borrows from a bank, the loan proceeds are not treated as taxable income. She gets cash. She keeps the asset. If the stock keeps rising, her wealth continues to grow.
This is one version of what is often called “buy, borrow, die.”
Buy or build appreciating assets. Borrow against them instead of selling. Hold them until death, when estate rules may allow heirs to receive assets with a stepped-up basis.
ProPublica’s Secret IRS Files reporting brought this strategy into public debate by showing how some of America’s wealthiest people could pay relatively little income tax compared with the growth of their fortunes.
This does not mean every billionaire literally follows the same neat three-step formula. Tax planning is more complicated than slogans. But the underlying preference is real: current tax law often favors borrowing against appreciated assets over selling those assets.
The Yale Budget Lab summarizes the issue clearly: current law favors borrowing over selling appreciated assets, and reform options include treating certain borrowing as a taxable event, requiring capital-gains prepayment when borrowing occurs, or imposing an excise tax on covered loans.
This is a more targeted reform than a general wealth tax.
It does not tax a founder simply because her company became valuable. It taxes the moment when appreciated wealth is converted into spendable cash without a sale.
That distinction matters.
A tax on asset-backed borrowing would be easier to connect to actual liquidity. The billionaire has received cash. The loan can be tracked. The collateral can be documented. Banks already report financial information. The tax base is narrower and more concrete than “all wealth everywhere.”
It would also reduce a distortion in the current system.
Right now, selling an asset can trigger tax, while borrowing against it may not. That gives wealthy people a reason to use leverage for tax reasons, not just financial reasons. A well-designed borrowing tax would narrow the gap between selling and borrowing.
It would not solve everything. The rich would still plan around it. There would be questions about thresholds, business loans, margin loans, refinancing, liquidity, and double taxation.
But compared with valuing every billionaire’s entire fortune every year, taxing certain loans against appreciated assets is a cleaner target.
It attacks the escape route rather than the existence of wealth itself.
Better Target 2: Close Inheritance and Trust Loopholes
If taxing billionaire wealth during life is hard, taxing it at death should be easier.
After all, the person who built the fortune no longer needs an incentive to keep innovating. The heirs did not create the wealth. And a society that claims to believe in meritocracy should be uncomfortable with permanent dynasties.
That is the philosophical case for inheritance taxation.
It is not a tax on effort. It is a tax on unearned transfer.
The OECD has argued that inheritance, estate, and gift taxes can help raise revenue, address inequality, and improve efficiency, especially when designed with equity and administrative concerns in mind.
The United States already has a federal estate tax. But the headline rate is misleading.
As of 2026, the federal estate and gift tax exemption is $15 million per person, according to the IRS. For a married couple, that can mean $30 million before the federal estate tax becomes relevant. Above the exemption, the top rate remains 40%.
That sounds substantial.
But truly wealthy families do not approach estate tax as a simple bill to be paid at death. They plan for years or decades. They use trusts, gifts, valuation discounts, family entities, charitable structures, generation-skipping arrangements, and other tools to reduce the taxable estate.
Some of this planning is legitimate. Families should be allowed to organize their affairs.
But there is a difference between ordinary estate planning and building a system where fortunes can remain largely intact across generations while ordinary workers pay tax every time they receive a paycheck.
Dynasty trusts are a good example of the problem. These structures can preserve wealth for descendants across multiple generations, depending on state law and trust design. They are not just about passing money to children. They are about creating long-lived family wealth machines.
This is where reform should focus.
Close loopholes that allow massive fortunes to avoid estate taxation. Limit dynasty trusts. Tighten valuation discounts. Reform grantor trusts. Revisit stepped-up basis. Make it harder to pass appreciated assets through generations without ever fully taxing the gain.
This approach has one major advantage over a wealth tax: it targets inherited privilege more directly than entrepreneurial wealth creation.
A founder who builds a company may plausibly argue that high taxes during the growth phase reduce risk-taking. But that argument is much weaker when the question is whether great-grandchildren should inherit billions through carefully engineered structures.
Capitalism is supposed to reward value creation.
Dynastic wealth rewards birth.
A serious tax system should know the difference.
Better Target 3: Tax Carried Interest Like Income
The carried interest loophole is less famous than wealth taxes, but it is one of the clearest examples of how the tax code treats certain elite income differently from ordinary work.
Private equity, venture capital, and hedge fund managers are often paid in two ways.
First, they receive management fees. These are usually taxed like ordinary income.
Second, they receive a share of the profits, often around 20%. This is carried interest. In many cases, it is taxed at lower capital-gains rates rather than ordinary income rates.
The Tax Policy Center explains the basic contrast: management fees are taxed as ordinary income, while carried interest is generally taxed at lower capital-gains rates.
This is hard to defend as a matter of fairness.
A doctor earns income by performing surgery. A lawyer earns income by serving clients. A fund manager earns compensation by managing other people’s money. Yet part of that compensation can receive preferential tax treatment because it is structured as a share of investment profits.
Supporters argue that carried interest rewards risk-taking and aligns managers with investors.
There is some truth to the alignment point. Performance-based compensation can encourage managers to generate returns.
But the tax question is different.
If the manager is being paid for services, why should that payment be taxed more lightly than other high-income labor? The investors supplied the capital. The manager supplied skill, access, deal-making, and labor.
That looks like compensation.
Taxing carried interest as ordinary income would not fix inequality by itself. The revenue estimates are modest compared with the scale of federal spending. The Congressional Budget Office estimate cited by the Tax Policy Center suggests that treating carried interest as ordinary income would raise about $13 billion over ten years.
But the symbolic value is larger than the dollar amount.
A tax system loses legitimacy when ordinary workers believe the rules are strict for them and flexible for the well-advised. Carried interest reinforces that perception. It tells people that if income is packaged through the right financial structure, it can receive a better deal.
Closing the loophole would be simple compared with a wealth tax.
It would not require valuing every billionaire’s assets.
It would not require annual net-worth audits.
It would not ask whether a private company is worth $7 billion or $10 billion.
It would ask a simpler question: is this compensation for managing money?
If yes, tax it like compensation.
The Real Problem Is Tax Design, Not Just Tax Rates
Tax debates often collapse into a fight over rates.
Raise taxes.
Cut taxes.
Tax the rich.
Protect investment.
But the deepest problems are often about design, not headline rates.
A poorly designed high tax can raise less money than expected, create avoidance opportunities, and damage trust. A well-designed lower tax can raise more reliable revenue with fewer distortions.
That is especially true with billionaires.
If the government raises the top income-tax rate, billionaires who do not realize much income may barely notice. If it creates a wealth tax with weak valuation rules, lawyers will feast. If it raises estate taxes without closing trust loopholes, dynastic wealth will adapt. If it attacks borrowing without addressing stepped-up basis, the strategy may simply shift.
The rich do not respond only to tax rates. They respond to definitions.
What counts as income?
What counts as realization?
What counts as a loan?
What counts as a gift?
What counts as estate property?
What counts as compensation?
What counts as capital gain?
That is where the real battle happens.
The problem is not only that billionaires are undertaxed. The problem is that their wealth often sits in categories the tax system treats gently: unrealized gains, collateralized borrowing, inherited assets, preferential capital gains, trusts, and partnership structures.
So the smarter approach is not necessarily to invent one giant tax on everything.
It is to identify the pressure points where wealth escapes taxation and close them one by one.
Borrowing against appreciated assets.
Stepped-up basis.
Dynasty trusts.
Estate valuation discounts.
Carried interest.
Preferential treatment for income disguised as capital gain.
These reforms are less emotionally satisfying than announcing a billionaire wealth tax. They are also less likely to collapse under their own complexity.
Tax design is not glamorous.
But it is where fairness becomes enforceable.
More Revenue Does Not Automatically Mean Better Government
There is one more uncomfortable point.
Even if the rich pay more, that does not automatically mean the public gets better services.
This argument is often made in bad faith by people who oppose almost all taxes. But it still contains a truth: revenue and state capacity are not the same thing.
A government can raise more money and spend it badly. It can collect more taxes and still have broken healthcare, weak infrastructure, expensive procurement, fraud, waste, and programs that do not deliver.
The United States is a useful example because its tax debate is often framed as if the country simply does not collect money. The reality is more complicated. The U.S. collects less tax as a share of GDP than many OECD peers, but it still raises enormous absolute revenue because its economy is so large. The problem is not only how much it collects. It is also what it gets in return.
Healthcare is the clearest case. The U.S. spends far more than other wealthy countries while leaving many people with worse access, higher bills, and more financial anxiety. Defense spending is another area where scale does not automatically produce accountability. The Government Accountability Office reported $162 billion in improper federal payments in fiscal year 2024, down from $236 billion in fiscal year 2023, but still a staggering number.
This does not mean tax reform is pointless.
It means tax reform and spending reform are different problems.
A fairer tax code can reduce unjust privilege. Better enforcement can restore legitimacy. Smarter taxation of billionaire wealth can raise revenue and reduce distortions.
But if public money flows into broken systems, the political backlash will be severe.
People do not only ask whether billionaires paid.
They ask whether anything improved.
So the honest position is not “taxes solve everything.” They do not.
The honest position is also not “spending is wasteful, so do nothing.” That is too convenient.
The honest position is that a healthy state needs both: a tax system that the wealthy cannot easily game, and a spending system that turns public revenue into visible public value.
One without the other will disappoint.
The Better Question: What Tax Can the Rich Not Easily Escape?
The debate over taxing billionaires usually begins with morality.
That is understandable. Extreme wealth provokes moral questions. How much inequality can a society tolerate? How much public obligation comes with private fortune? Should dynastic inheritance be allowed to harden into a permanent class system? Why should workers be taxed more visibly than asset owners?
But morality is only the beginning.
The real test is execution.
A billionaire wealth tax may be emotionally satisfying, and in some designs it may even be defensible. But it is also vulnerable to the hardest problems in tax policy: valuation, liquidity, avoidance, migration, litigation, and political erosion.
That does not make the billionaire tax debate useless. It makes it clarifying.
It shows us what the tax system is failing to reach.
Unrealized gains.
Borrowed consumption.
Inherited fortunes.
Trust structures.
Preferential treatment for elite financial income.
Compensation disguised as capital gain.
Those are better targets than a slogan.
The goal should not be to punish wealth for existing. It should be to stop extreme wealth from moving through the economy in forms that ordinary taxation cannot touch.
Tax the loan when appreciated assets become spendable cash.
Tax inheritance before family fortunes become permanent dynasties.
Tax carried interest like the labor income it often is.
Close the loopholes that make the headline estate tax weaker than it looks.
Reduce the gap between economic income and taxable income.
And then make sure the money is spent in ways people can actually feel.
Because the question is not simply whether we should tax billionaires more.
The question is whether we can design a system where billionaires pay more without giving them a roadmap to escape.
That is the difference between a tax that sounds fair and a tax that works.
Last Updated on June 30, 2026 by Aseem Gupta