I have posted extensively in ET forums on how Reagans supply-side economics which resulted in a dramatic compression of tax rates -- at one point nearly eliminating progressivity in our income tax code -- has been a major factor in wealth redistribution in the U.S.. The effect of Reagan era compression of tax rates, combined with taxing unearned income at lower rates than earned, compounded over many years, has resulted in the redistribution of wealth from the middle class upward to the already wealthy. In no small measure, this has been responsible for the lopsided wealth distribution we see in today's America. Ronald Reagan, the "Great Wealth Redistributor".
Reagan meant well but his policies proved disastrous for the long term. And amazingly, we still have a large fraction of the Republican party today advocating supply-side economics, despite Reagan's own eventual recognition of the failure of supply-side economics. It turns out that you can't help the middle class by giving their money to the rich. Who would have thought!