If all the money ends up in hands of billionaires and their corporations and there will be no money in hands of regular plebs…
Who do you think will have to pay the taxes?
Also, the people would figure out a different way of trading or currency. And with that one getting taxed, all the billionaire’s money become worthless.
This is where AI comes in too, a new hyper repressive economy will be much easier to enforce with killer robots that do whatever you tell them without question.