While perusing the Internet, I saw an article by Iwan Morgan, who is the author of The Age of Deficits: Presidents and unbalanced Budgets from Jimmy Carter to George W. Bush. The author asserted in this article that, “The deficit explosion on his watch was a nasty surprise for Ronald Reagan not a deliberate strategy to reduce government. In his rosy interpretation of Laffer curve theory, the personal tax cuts he promoted in 1981 would deliver higher not lower revenues through their boost to economic growth.”

The first sentence is an interesting interpretation, since many leftists believe that Reagan deliberately created deficits to make it more difficult for Democrats in Congress to increase spending. I’m agnostic on that issue, but Morgan definitely errs (or is grossly incomplete) in the second sentence. The Reagan Administration did not employ dynamic scoring when predicting the revenue impact of its tax rate reductions. It is true that the White House failed to predict the drop in revenues, particularly in 1982, but that happened because of both the second stage of the 1980–82 double-dip recession and the unexpected drop in inflation (the Congressional Budget Office also failed to predict both of these events, so Reagan’s forecasters were hardly alone in their mistake). Moreover, Morgain’s dismissal of the Laffer Curve is unwarranted. While several GOP politicians exaggerated the relationship between tax rates, taxable income, and tax revenue, this does not mean it does not exist.

The table below, which is based on data from the IRS’s Statistics of Income, shows what happened to tax collections from upper-income taxpayers between 1980 and 1988. Supply siders can be criticized for many things, especially their apparent disregard for the importance of limiting the size of government, but the IRS figures clearly show that lower tax rates were followed by more rich people, more taxable income, and more tax revenue. For those keeping score at home, that’s a perfect batting average for supply-side economics.