Greed

Regardless of the system, the people at the top are capitalists.

The only question is whether they allow the other people to be.

Milton Friedman is unstoppable. He taught at Chicago University (one of the world's finest school for economics) where not even the professors could find room to disagree with him once he got started explaining things. He went on to win the Nobel Prize in economics, largely for his explanations of American monetary policy and explaining why the government should basically stay out of businesses' way.
Here's part of a chat he had with Phil Donahue:

The first video for this interview can be found below. The entire show was uploaded by the same user.