Being a thoughtful and kind person, I offered some advice last year to Barack Obama. I cited some powerful IRS data from the 1980s to demonstrate that there is not a simplistic linear relationship between tax rates and tax revenue.
In other words, just as a restaurant owner knows that a 20-percent increase in prices doesn’t translate into a 20-percent increase in revenue because of lost sales, politicians should understand that higher tax rates don’t mean an automatic and concomitant increase in tax revenue.
This is the infamous Laffer Curve, and it’s simply the common-sense recognition that you should include changes in taxable income in your calculations when trying to measure the impact of higher or lower tax rates on tax revenues.
No, it doesn’t mean lower tax rates “pay for themselves” or that higher tax rates lead to less revenue. That only happens in unusual circumstances. But it does mean that lawmakers should exercise some prudence and judgment when deciding tax policy.
Moreover, even though I’m a strong believer in the importance of good tax policy, it’s also important to understand that taxation is just one of many factors that determine economic performance. So lower tax rates, by themselves, are no guarantee of economic vitality, and higher tax rates don’t necessarily mean the world is coming to an end.
With those caveats in mind, take a look at this table from the Congressional Budget Office’s most recent Budget and Economic Outlook. Taken from page 109, it shows what will happen if the economy grows just a tiny bit less than the baseline projection. Not a recession, by any means, just a drop in the projected growth rate of just 1/10th of 1 percent.
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