California's Wealth Tax Dilemma: Why Mobile Wealth Is So Hard to Chase

California's Tax Problem: Wealth That Has Feet

California is trying to collect more taxes from high-net-worth individuals — but this wealth isn't sitting still. It's mobile, and it can move at any time. An analysis from the Land Economics blog sparked heated discussion on Hacker News, earning 263 upvotes and over 700 comments, cutting straight to a fundamental policy contradiction facing high-tax states.

The article's central metaphor is both apt and pointed: the wealth California is chasing has "feet." Unlike fixed assets such as land or real estate, high-income individuals and their capital can move freely across state lines. When tax pressure crosses a certain threshold, rational taxpayers vote with their feet — relocating to lower-tax states like Texas and Florida, which have no state income tax.

The Nature of Wealth Mobility

The economic distinction between a "mobile tax base" and an "immobile tax base" is critical. Real estate and natural resources fall into the latter category — no matter how tax rates change, land cannot be relocated, so taxing it doesn't cause the tax base to flee. Taxing high earners, corporate profits, and financial capital is an entirely different story. These tax bases are highly sensitive to tax rates.

When a state builds its fiscal policy on a highly mobile tax base, it's essentially chasing a target that keeps moving away. The higher the tax rate, the stronger the incentive to leave — which can ultimately shrink the tax base so much that total revenue falls rather than rises.

The concept of "deadweight loss" helps explain why taxing a mobile base is so inefficient. When mobile tax bases are taxed, some taxpayers change their behavior — reducing taxable activity, relocating, or shifting assets — resulting in a double loss: no tax revenue collected and no real economic output either. The higher the tax rate, the more severe this behavioral distortion, and the greater the deadweight loss. Economists measure taxpayer sensitivity to rate changes using the "elasticity of taxable income" (ETI): the higher the ETI, the more tax base is lost when rates go up. Research shows that top earners in the U.S. have relatively high ETIs, meaning that raising taxes on this group often yields far less additional revenue than static projections suggest.

The Unintended Consequences of High-Tax Policies

Policymakers often assume the tax base is fixed: raise taxes on a group by 10%, and you collect 10% more. But in reality, taxpayer behavior shifts in response to policy changes. This "behavioral response" is the root cause of so many failed revenue forecasts.

When California raises rates on the wealthy, some high-net-worth individuals reassess where they want to live. For those whose income comes primarily from capital gains, equity compensation, or work that can be done remotely, the cost of relocating is relatively low — while the tax savings can be substantial. The rise of remote work has lowered the barrier to geographic mobility even further, making it easier than ever to vote with your feet.

Who Leaves, Who Stays

Worth examining is the structural nature of wealth migration. Those most likely to leave are precisely the top earners who contribute the most in taxes — they have both the financial means and the financial motivation to go. Middle-income workers, by contrast, are more tightly bound to their locations by jobs, families, and social ties.

This means aggressive wealth taxes can trigger a kind of adverse selection: the highest tax contributors leave fastest, while the middle- and lower-income groups the policy was meant to protect end up bearing a heavier fiscal burden. This is a common dilemma for high-tax jurisdictions everywhere.

Land Taxation as an Alternative

The Land Economics blog's perspective — evident from its very name — favors shifting the tax burden away from mobile tax bases toward immobile ones like land. This line of thinking traces back to economist Henry George's "single tax" theory.

The core advantage of a Land Value Tax (LVT) is that the tax base cannot escape. Land doesn't disappear or relocate because tax rates rise, so this type of tax produces almost no distortionary effects. Economists broadly agree that land taxes are among the most efficient forms of taxation — they don't penalize productive investment or labor, taxing only the location value of land itself.

The Real-World Political Resistance

Despite its theoretical advantages, land taxation faces enormous political obstacles. Landowners are a powerful interest group, and any attempt to increase land tax burdens meets fierce opposition. California's famous Proposition 13 is a textbook example — it severely limited property tax growth and reflects voters' acute sensitivity to land-related taxation.

This creates a policy paradox: the most efficient tax base is the hardest to touch politically, while the politically easier wealth tax is the most economically fragile.

Henry George (1839–1897) was an American political economist whose 1879 book Progress and Poverty laid the theoretical foundation for the land value tax. George observed that as society progressed and cities developed, land values rose continuously — but this appreciation was not the result of landowners' own labor or investment. It was an external dividend created by broader social development: economic rent. He therefore argued that the increase in land value should be returned to society through taxation and used to replace all other taxes — the "Single Tax" proposal. While modern economics doesn't fully endorse eliminating other taxes, it broadly validates land taxation's efficiency. Nobel laureates including Paul Samuelson and Joseph Stiglitz have praised it. Land taxes work efficiently because the supply of land is perfectly inelastic — regardless of the tax rate, the total amount of land doesn't change, so production decisions aren't distorted and no deadweight loss is generated.

California's Proposition 13 was passed by voters in 1978 and is one of the most influential pieces of property tax limitation legislation in American history. It capped property assessed values at their 1975 levels, limited annual increases to no more than 2%, required reassessment to market value only upon sale, and set a maximum property tax rate of 1% of assessed value. This mechanism created a severe "lock-in effect": longtime owners enjoy extremely low tax bases, while new buyers pay based on current market value — producing situations where neighbors on the same street owe wildly different tax bills. The passage of Proposition 13 profoundly reshaped California's fiscal structure, forcing the state to seek revenue from other taxes and driving heavier dependence on high-income earners' income tax. This is one of the historical roots of California's current tax predicament.

Lessons for Tax Policy

This debate offers lessons for every high-tax jurisdiction. Tax policy design must fully account for the mobility of the tax base, rather than treating taxpayers as passive, fixed subjects of taxation. Revenue forecasts that ignore behavioral responses consistently lead to fiscal shortfalls and policy failures.

In an era of digital economies and remote work, the mobility of capital and high-skilled labor will only increase. Interstate competition for wealth and talent is intensifying. Simply raising rates on mobile tax bases may only accelerate wealth outflows rather than boost revenue.

A truly sustainable tax system may require a more sensible balance between mobile and immobile tax bases — building more of the fiscal foundation on tax bases that cannot flee. California's struggle to chase "wealth with feet" is a vivid warning of what happens when that principle is ignored.