"As for “significant tax increases” under Reagan, this is standard progressive agitprop, and it refers to the payroll tax rate hikes in Reagan’s first term. But in the largest source of revenue to the feds, the personal income tax, Reagan inherited a 70 percent top rate and left office with a 28 percent top rate. Compare that 42 percent cut with the rate hike in the payroll tax. There is no comparison."

There is a comparison. Tax Simplification eliminated interest write-offs, etc. The proper comparison would be to look at total revenues. If they went up, then, we had a tax increase.