A 'flat tax' that includes a 'net worth' tax seems like a good idea, but what are the objections?

Mr. Sandman, one of our fellow posters ask a similar question today. My answer added the possibility of a 'wealth tax' to make this work...bad choice of words and I got bombed for it. Still, properly instituted, something like a 'net worth tax' (better choice of words), let's say a fraction of a per cent above X amount of 'net worth'. Doing this will prevent the worst effect of a flat tax...that is eventually a small part of the population would eventually own ALL of the wealth producing ets of this country. Check this out and let's talk. No you $%^&$ 'liberals' stuff...give it a real think.