What would you do if you had a bigger budget?

Maybe you really would have taken that vacation, upgraded your running shoes, or bought steak instead of ground beef if you’d had room in your budget to do it. But if you don’t, well, those options are removed. Individuals are constrained by the limits of their resources, full stop.

Taxation tightens those constraints even further.

As we mentioned in our last post, every tax changes behavior. When you tax something, you get less of it. Tax income, and people work less or find ways to shield their earnings. Tax investments, and people take fewer risks or look for tax-advantaged alternatives. Tax property, and ownership becomes less attractive. People respond to incentives, and taxation fundamentally alters the incentive structure of economic decision-making.

Think about it this way. You earn money, and before you ever see most of it, portions get carved off. Federal income tax. State income tax in most places. Social Security and Medicare taxes. Maybe local income taxes, depending on where you live. By the time your paycheck hits your account, a meaningful chunk of what you earned is already gone.

That money represented options. The vacation you didn’t take. The emergency fund you haven’t built. The investment you couldn’t make. When taxation reduces your available resources, it doesn’t just take money. It removes choices.

And if you’ve ever met people, you know we don’t particularly enjoy having our choices removed. So we adapt. We find ways around those limitations. And the tax code, obligingly, provides numerous opportunities to do exactly that.

The U.S. tax code is famously complicated. Tens of thousands of pages are complicated. It’s riddled with exceptions, carve-outs, special conditions, and countless other subtle or not-so-subtle ways to reduce your tax burden.

Retirement accounts like 401(k)s and IRAs let you defer taxes to the future, encouraging saving while reducing your current tax bill. Mortgage interest payments are deductible, making home ownership more attractive from a tax perspective. Investment choices carry different tax treatments. Getting married changes your tax situation. Having children opens up new deductions and credits. Charitable donations reduce taxable income. Health savings accounts offer triple tax advantages. The list goes on and on.

Each of these represents a behavioral change prompted by taxation. People aren’t contributing to their 401(k)s solely because they want to save for retirement, though that’s certainly part of it. They’re also responding to the tax incentive that makes it financially sensible. The same goes for buying a home, timing the sale of investments, or structuring charitable giving.

None of this is cheating or gaming the system. These are legal provisions explicitly written into the tax code, often with the specific intent of encouraging certain behaviors. The government wants you to save for retirement, own a home, and donate to charity, so it creates tax incentives to make those choices more attractive.

But here’s the thing about incentives: they always work.

When tax policy creates strong enough incentives, people will alter their behavior in ways that might not make economic sense absent those incentives. They’ll buy homes they can’t really afford because the mortgage interest deduction makes it seem more feasible. They’ll hold onto investments longer than optimal to avoid triggering capital gains taxes. They’ll structure their lives around tax considerations rather than what would otherwise serve them best.

Capitalism operates under the constraints that taxation imposes. People are still making voluntary choices and responding to price signals, but those signals are now distorted by the tax code, pulling decision-making away from pure personal considerations toward tax-advantaged alternatives.

And there’s a limit to how much of this people will tolerate.

Economist Art Laffer mapped this reality in what’s now called the Laffer Curve. The basic insight is straightforward: there are limits to what people will accept being taxed before they change their behavior to avoid it.

At a zero percent tax rate, the government collects nothing. That’s obvious. At a 100 percent tax rate, the government also collects nothing, because why bother doing anything if it’s just going to be taken away. Somewhere between those extremes lies a point where tax revenue is maximized.

Beyond that tipping point, higher tax rates don’t produce higher revenue. Instead, people find ways to avoid the taxes. In extreme cases, they stop engaging in the taxed activity altogether. This is documented behavior across different tax systems and time periods.

You see it play out every time a new tax gets proposed, or an existing one gets changed. Politicians and analysts trot out projections showing how much revenue the change will raise or cost over the next decade. These projections invariably make the same flawed assumption that people’s behavior won’t change in response to the new tax regime.

But it always does.

Raise taxes on high earners significantly, and you’ll see increased use of tax shelters, more income shifted to capital gains, greater use of trusts and other legal structures to minimize exposure. Some people will work less or retire earlier. Others will relocate to jurisdictions with lower rates.

Impose new taxes on specific goods or services, and consumption of those goods or services drops. Sometimes dramatically. People substitute alternatives. They find workarounds. They reduce their participation in the taxed activity.

The projections rarely account for this adequately because it’s difficult to predict exactly how people will adjust their behavior. But the direction is predictable.

This dynamic explains why tax increases often generate less revenue than projected and tax cuts sometimes cost less than expected. The static analysis that assumes unchanged behavior misses the reality of how capitalism actually functions. People respond to incentives. They adapt to changing circumstances. They find ways to pursue their goals within whatever constraints exist.

Taxation represents one of those constraints. It limits resources available for private decision-making. It creates incentives that pull behavior away from pure market signals toward tax-advantaged alternatives. And beyond a certain point, it triggers avoidance behavior that defeats the purpose of the tax increase in the first place.

This is why Milton Friedman emphasized the importance of being incredibly thoughtful about how and what we tax. Since behavioral changes in response to taxation are unavoidable, and those changes impact overall economic activity, the structure of taxation matters enormously. Broad bases with low rates minimize distortions. Complexity breeds avoidance. High rates trigger the very behavioral shifts that undermine the goal of raising revenue.

Understanding this doesn’t require agreeing with any particular tax policy. It requires recognizing how people actually behave when faced with taxation. They don’t passively accept whatever burden gets imposed. They adjust. They adapt. They find ways to preserve their choices and resources within the system that exists. Capitalism operates through individuals making decisions based on the incentives they face, even when those incentives have been distorted by taxation.

Learn more about capitalism here.