President Obama is proposing a series of major tax increases. His budget envisions higher tax rates on personal income, increased double taxation of dividends and capital gains, and a big increase in the death tax. His health care plan includes significant tax hikes, including the imposition of the Medicare payroll tax on capital income – thus exacerbating the tax code’s bias against saving and investment. It is unclear why the White House is pursuing these punitive policies. The President said during the 2008 campaign that he favored soak-the-rich taxes even if they did not raise revenue, but his budget predicts the proposals will raise lots of additional money.

Because of Laffer Curve reasons, it is highly unlikely that all of this additional revenue will materialize if the President’s budget is approved. The core insight of the Laffer Curve is not that all tax increases lose money and that all tax cuts raise revenues. That only happens in rare circumstances. Instead, the Laffer Curve simply reveals that higher tax rates will lead to less taxable income (or that lower tax rates will lead to more taxable income) and that it is an empirical matter to figure out the degree to which the change in tax revenue resulting from the shift in the tax rate is offset by the change in tax revenue caused by the shift in the other direction for taxable income. This should be an uncontroversial proposition, and was explained in the video from this post. But since many comments and emails expressed disbelief, this video looks at the real world evidence.

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A former reporter for the New York Times, Fox Butterfield, became a bit of a laughingstock in the 1990s for publishing a series of articles addressing the supposed quandary of how crime rates could be falling during periods when prison populations were expanding. A number of critics sarcastically explained that crimes rates were falling because bad guys were behind bars and invented the term “Butterfield Effect” to describe the failure of leftists to put 2 + 2 together.

We now have a version of the Butterfield Effect in tax policy. Recent IRS data show that rich people earned a record amount of income in 2007 and also faced their lowest effective tax rate in almost two decades. Proponents of soak-the-rich tax policy complain about these developments, but they seem oblivious to the Laffer Curve insight that rich people earned more income in part because tax rates were lower. This video explains how the Laffer Curve works.

Liberals don’t understand that if they penalize the rich with higher tax rates, as President Obama is proposing, they will be disappointed to discover that they collect considerably less revenue than predicted for the simple reason that wealthy taxpayers will respond by earning less taxable income. This Bloomberg excerpt is a good example. The leftist quoted in the article assumes that income is a fixed variable and successful taxpayers will passively endure higher taxes.

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