Why Confiscating Billionaire Wealth Wouldn't Solve Government Budgets—And What It Takes to Become a Billionaire in Such a System

California’s proposed wealth tax has ignited fierce debate about whether targeting the ultra-wealthy can truly rescue the state’s struggling finances. However, according to budget analysis from leading economist Kent Smetters, the reality is far more sobering than populist rhetoric suggests. Understanding how wealth actually accumulates—and what it would take to become a billionaire under different tax regimes—reveals why aggressive wealth confiscation falls short of policy expectations.

The Failed Promise of Wealth Taxes Across the Globe

The appeal of wealth taxes seems straightforward: tax the ultra-wealthy and generate substantial revenue. Yet history tells a different story. Austria, Denmark, Germany, and France all experimented with wealth taxes, only to abandon them after disappointing results. As of June 2024, just four OECD member nations still maintain wealth taxes, while the United States has never implemented one—partly due to constitutional concerns and partly due to the lessons learned internationally.

When these nations repealed their wealth taxes, a pattern emerged. Most collected less than 0.3% of GDP despite high administrative costs and persistent challenges in valuing complex assets like startups and sports franchises. The gap between projected revenue and actual returns exposed a fundamental flaw in the policy design: wealth is far more mobile and difficult to tax than income.

How Kent Smetters Challenges the Billionaire Tax Narrative

Kent Smetters, a professor at the Wharton School and director of the Penn Wharton Budget Model (PWBM), brings decades of fiscal expertise to this debate. His background spans roles at the Congressional Budget Office and the U.S. Treasury, positions that required him to assess the real-world impacts of tax policy proposals. Speaking with Fortune, Smetters articulated a uncomfortable truth: wealth taxes function poorly as revenue generators, and current enthusiasm for them reflects what he calls a “perfect storm” of economic anxiety rather than sound fiscal planning.

Smetters describes the PWBM as a “policy sandbox” where legislators can test ideas before implementation. This framework has revealed that populist tax proposals, while emotionally appealing, often produce negligible fiscal results. His skepticism isn’t ideological but empirical, rooted in modeling that traces how wealth behaves when subject to aggressive taxation.

The Math Behind Why Targeting Billionaires Won’t Balance the Budget

To illustrate his point, Smetters posed a hypothetical scenario: What if the federal government confiscated all wealth exceeding $999 million? The resulting pool of funds would cover federal government expenses for merely seven to eight months. This calculation exposes a misconception at the heart of the billionaire tax movement: the absolute quantity of billionaire wealth, while staggering in individual terms, remains modest relative to the scale of government spending.

This finding contradicts the assumption that billionaires hoard sufficient resources to meaningfully reshape public finances. Instead, it suggests that even complete wealth confiscation addresses only a sliver of fiscal imbalance. The implications are significant: if targeting billionaires won’t solve the budget crisis, then policymakers must consider alternative approaches to taxation and spending discipline.

Economic Factors Driving the Push to Tax the Ultra-Wealthy

Why, then, does the wealth tax movement persist? Smetters attributes the momentum to several converging forces. The rapid advancement of artificial intelligence generates anxiety about job displacement, particularly as tech leaders amplify these concerns. The dominance of a handful of mega-cap companies in the S&P 500 creates a perception that wealth concentration is accelerating. Meanwhile, social media amplifies populist narratives, creating political pressure for dramatic action.

Smetters also invokes the concept of “money illusion” from behavioral economics—a phenomenon where people perceive themselves as poorer despite rising living standards, because they focus on nominal price increases rather than real improvements in quality of life. Americans today enjoy vastly higher living standards than previous generations, yet this progress often feels invisible to voters experiencing stagnant nominal wages.

These psychological and social factors explain the appeal of wealth taxes, even when the data suggests they’re ineffective. They also connect to the broader question of how wealth accumulates in the first place: in a system with aggressive wealth taxation, the pathways to become a billionaire would narrow substantially, potentially reducing entrepreneurial incentives and economic dynamism.

Building Wealth vs. Redistributing It: The Real Policy Debate

Rather than pursuing wealth taxes, Smetters advocates for broadening the tax base through mechanisms like comprehensive sales taxes or value-added taxes (VAT). These approaches generate more stable revenue streams without the valuation complexities and avoidance behaviors that plague wealth taxes. California’s current reliance on a highly progressive and volatile tax system leaves it exposed to economic fluctuations—a structural vulnerability that wealth taxes won’t address.

Smetters describes himself as “80% libertarian,” meaning he generally favors market-driven solutions with exceptions for market failures like pollution or underinvestment in human capital. From this perspective, the focus should be on broadening revenue sources rather than squeezing specific wealthy individuals.

Some progressive economists counter that the PWBM’s assumptions overstate the costs of taxation while understating benefits of public investment, potentially biasing analysis against expansive social programs. Smetters acknowledges that well-designed spending—particularly in early childhood education, healthcare, and environmental initiatives—can produce positive economic returns. He also notes that high-skilled immigration boosts wages broadly, including for native-born workers.

The real debate, then, isn’t whether billionaires should exist or whether wealth inequality matters. Rather, it concerns the most efficient mechanisms for funding government and the trade-offs between redistribution and growth. That debate requires acknowledging what the data shows: confiscating billionaire wealth won’t solve budget problems, but understanding why people seek such extreme measures provides insight into the deeper economic anxieties reshaping American politics.

A Uniquely American Tax Conversation

Smetters highlights that the United States already operates one of the most progressive tax systems among OECD nations. The wealthy pay a disproportionately large share of total taxes, while lower-income households often receive net benefits through programs like the earned income tax credit. Yet the U.S. collects less total tax revenue relative to GDP compared to many developed peers, constraining the programs that government can fund.

This creates a distinctive American paradox: a highly progressive tax system that still generates insufficient revenue for expansive spending. California faces an acute version of this challenge, which explains both the pressure to pursue aggressive wealth taxes and the importance of accurately modeling their likely impact. Understanding that confiscating billionaire wealth would only fund government operations briefly, rather than permanently, is essential to crafting realistic fiscal policy.

The intensity of U.S. tax debates reflects broader uncertainties about fairness, opportunity, and how societies should distribute resources. These are legitimate concerns, but they’re best addressed through evidence-based policy rather than policies that feel intuitively appealing but demonstrably fail to deliver on their promises.