← Back to Articles

A Zucman-Inspired Billionaire Tax

Economist Gabriel Zucman's warning feels urgent. We turned it into a proposal you can debate.
👤 By Support DirectGov 📅 June 21, 2026 Government

The age of the trillionaire has arrived. Elon Musk became the world's first trillionaire following SpaceX's IPO. For economist Gabriel Zucman, this isn't a milestone to celebrate. It's a flashing red warning light for democracy itself.

Zucman's Argument: Extreme Wealth Is Extreme Power

In his recent essay, "The era of trillionaires will be dire for democracy", the Paris School of Economics professor and 2023 John Bates Clark Medal winner makes a blunt case. "Those who rejoice in Musk's fortune surpassing the $1tn mark," he writes, "need to be reminded of a simple truth: the mere existence of trillionaires is a major political and economic problem — and there is a fundamental tension between extreme wealth and the very possibility of democracy."

Why? Because extreme wealth is always an extreme power — the power to stifle competition, the power to shape public discourse, the power to influence policymaking, the power to buy elections, and the power to stall social progress. This isn't a new worry. All the thinkers of democracy, from Aristotle more than 2,000 years ago to Lea Ypi at the London School of Economics today, have highlighted the corrosive nature of extreme wealth for society.

The numbers back him up. The difference between the Gilded Age and today is not one of kind, but of scale: in 1910, the richest 0.00001 percent of Americans owned wealth equivalent to 4 percent of national income; today that number has risen to 12 percent. And as Zucman has noted elsewhere, billionaire money now dominates politics — in the 2000 federal election cycle, billionaires accounted for 1% of total campaign spending; in 2024 they accounted for 19%, and 33% of all donations to the Trump campaign.

His proposed remedy is deliberately modest. Today, billionaires pay only about 0.2% of their wealth in taxes, because they structure their wealth to minimize taxable income. Zucman's 2% minimum rate would merely ensure that billionaires, comprising about 3,000 families worldwide, pay at least as high an effective tax rate as the middle class. Crucially, it's a floor, not a new burden on top of existing taxes. Someone who already pays the equivalent of 2% or more of their wealth in personal tax would owe nothing more; a billionaire who pays less would pay the difference to reach the 2% minimum.

We won't summarize the whole essay here — it's short, sharp, and worth reading in full. Read Zucman's piece on his Substack.

We Turned the Idea Into Actual Legislation

Reading Zucman's work, the DirectGov team had a simple thought: ideas are powerful, but laws are what change things. So we did the work of translating his framework into a concrete, drafted-and-analyzed bill.

The result is A Minimum Tax on Billionaires — legislative text modeled directly on the outline of Zucman's plan. We authored the statutory language and analyzed how it would function in the U.S. context: who it covers, how wealth is valued, how the minimum-tax floor interacts with taxes already paid, and what it might raise.

That work draws on the design Zucman himself laid out. Technically, the minimum tax is what's known as a presumptive income tax: the idea is that a billionaire who reports little taxable income must be presumed to earn economic income that the tax code isn't capturing. Two common objections get a lot of attention, and our analysis addresses both:

  • Capital flight. Zucman's answer is coordination — the same mechanism already used for the global 15% corporate minimum tax now in force across 130+ jurisdictions — so that once enough major economies participate, there's nowhere meaningful to flee.
  • Liquidity. Because billionaires have averaged real rates of return of 7.5% per year since the 1980s, and the proposed 2% rate sits well below that — structured as a minimum tax to avoid double taxation — liquidity issues should be limited.

This is not a fringe academic exercise. Zucman has always insisted the next step belongs to citizens. He presents his proposal as one that citizens must debate: they have to weigh the benefits and costs and ultimately decide whether to adopt it.

That's exactly what DirectGov is for.

Your Move

So here's our ask. **Read out full analysis of Minimum Tax on Billionaires. ** Pressure-test it. Do you find the capital-flight answer convincing? Is 2% too high, too low, or — as Zucman argues — a reasonable floor that simply asks the richest to match what a nurse or teacher pays? Bring your strongest arguments to the comments and debate it with your fellow citizens.

And if you think it deserves to become law, don't stop at debating. Promote the proposal to your elected officials. As Zucman's own framing makes clear, the technical work can be done — what's missing is the public will. On DirectGov, that part is up to you.

Sources