Basically we redistribute most of the wealth we confiscate from the millionaires to the working class, give the billionaires their pound of flesh for financing the revolution, and we banish the billionaires to a bunch of little special economic zones on islands and shit where they can do neofeudalcapitalism or whatever, but only there! The rest of the world transitions to communism and we let the next generation deal with the billionaires we made a Faustian bargain with.
We should basically do to billionaires what they tried doing to Napoleon.
If you make sure they're islands close to sea level we can let the sea solve the problem for us.