Even Marxists want playboys to buy Lamborghinis, because then the rich have less money. The real answer to what you're calling for would be to match capital gains with income taxes, although I'm sure that would have its own raft of unexpected effects. (For example, what would happen to middle-class retirement plans?)

Also: emissions taxes are sometimes regressive, for example consider that home prices usually go up with shorter commutes.

Since the most universal benefit of having money is getting the first pick of all the options, you'll quickly find that "those rich people" are incredibly hard to pin down with tax plans. Whatever you make the worst asset class will quickly end up in the hands of whoever can't afford better.