Well actually most of Bezos's wealth is in Amazon stock. Which he has to sell to make money. Its really not your gold-bricks-in-basement-vault money. Most of which he won't be selling till he dies. And that will go into some trust which will be owned by his descendants as inheritance.

The real thing about communism or capitalism isn't much about the merit of the idea in itself.

The quality of the political system that implements these ideas, efficiency of execution matters.