If Bezos gave all his money to everyone in the world we would all get maybe $13 or so. If all the billionaires did the same we would all get $1000 or so.
[1] https://en.wikipedia.org/wiki/The_Culture#Economy
[2] http://angry-economist.russnelson.com/money-is-not-a-sign-of...
Democratize their companies. control them by employment or by employee or government committee if they are too big. Make the big corporations work for the benefit of everyone, rather than shareholders and owners.
For what it's worth US laready has large ownership stakes in such corporations as AIG, Amtrak, USPS, Freddie Mac, etc.