But taxing capital is not possible and probably a bad idea. This will require you to list everything you own to the government who will then evaluate the worth of it. I really can't think of much else that's a worse violation of privacy. It will also make owning something expensive a bad idea, because you'll have to pay to own it. In fact, can you even say that you own it at that point? Aren't you basically renting it from the government instead? Thinking more about it, I'm surprised that totalitarian systems didn't have a wealth tax.