I can't overstate how important this is, and in a positive way. Republican politicians have lost their way on tax policy since the Reagan years. Back then, it was understood that cuts in marginal rates and simplification of the code would free up capital that was otherwise a) being paid to the government; or b) being used to comply with tax-driven manipulation of private behavior. The result of this would be more robust economic growth.
That this worked in the 1980s cannot be seriously disputed. The Reagan tax cuts of 1981 delivered sustained, robust growth. It was also true that Congress spent like drunken sailors during that time, and we saw consistent budget deficits as a result. But it wasn't because federal revenues suffered from the tax cuts. Federal revenues soared. If spending had merely been kept to the rate of inflation, we would have been running surpluses by the end of Reagan's second term.