Congressional Budget Office data discussed below shows that the gap (which is increasing) in pretax income between the very wealthy and the rest is smaller than the gap in after-tax income. Thus, the distribution of the tax burden itself is increasing inequality. I need to stress here that I am not talking about using the tax system to reduce income inequality, which is a use of the tax system that is utterly anathema to conservatives and libertarians alike. What I am saying here is that the tax system should be structured so that the distribution of the aggregate tax burden itself does not actually worsen income inequality. In other words, the government should not be intervening through the tax system to make the gap between the very rich and everyone else actually greater than it otherwise is (in the absence of tax). I think most Americans, whether Democrat or Republican (or Rockefeller Republican), would agree with that statement.
Go Forth and Spread the Bad News.