Ok, then what do you call a professional wage-labourer ("working class", in the marxist definition) who is nonetheless a millionaire? A high-paid professional on 100k can quite easily become a millionaire in their lifetime. If they are mere workers, same as the rest of us, that just strengthens my argument because a socialist regime would have to tax them less.

On the Panama Papres: double it, triple it. Doesn't stop eating the rich from not being a panacea, that's all I'm saying. At the risk of "englightend centrism" there's a middle-ground between rothbardian economics and utopian thinking.

That is... not how money works. In order to tax the Billionaire wealth (which primarily is the companies they own) you are either forcing them to sell (by taxing them x% of wealth, leaving them without liquid assets to pay the tax) or seizing assets and re-selling. You can't tax the rich and expect them to stay rich forever by virtue of taxing them.