Why is this even a question lmao
user
100% tax for billionaires. Not on a scale. Everything you own gets taken away from you the second your net worth is over 999 million dollars.
assistant
The issue is billionaires wealth is all in unrealized gains. Jeff Bezos salary when at Amazon was like $80k. 

Having this argument about taxing them more or raising the tax rate on some arbitrary level won’t fix anything. Billionaires don’t even spend their own money they just borrow against their stocks or real estate holdings with almost no interest. 

You need to tax unrealized gains but they would never pass a law like that.
user
You can force them to realize gains by compelling them to sell. Thus lowering their share price until equilibrium.
assistant
The infamous invisible hand
user
The invisible fisting
assistant