A progressive tax change can be revenue-neutral, so that the end result is exactly the same govt size as before. I.e. the govt growth that you're imagining in y

A progressive tax change can be revenue-neutral, so that the end result is exactly the same govt size as before. I.e. the govt growth that you're imagining in your last item does not need to happen, even if the previous items occur. If you try for a revenue-neutral change, and the rich somehow avoid paying their taxes, I fail to see how this would result in the middle class paying more taxes without a further tax change. If the rich avoid taxes, then we should change the tax code, including incentives and enforcement to overcome this. Don't just throw up your hands when you face a problem.