Look, you can't change humans. They are exactly the same animals they were 50,000 years ago and their basic behavior will not change. Game Theory was true for what happens in a cave as is for what is now happening in big corporations and institutions.

What we can do is change the rules so that those natural human instincts and modes of behavior are channeled in a beneficial way rather than into something ultimately no one would want.

This idea that the system does not need changing, that only if people would be better is the doom of any utopian idea. Communists in the USSR dreamed of creating a "communist man" who would actually benefit from and perpetuate their perfect system. With a tongue in cheek I would say that communism IS a perfect system... for communist humans.

Don't fall into this trap, it leads nowhere except maybe bitter misanthropy. If you've played board games you'll notice how players behavior changes markedly depending on the rules of the game (sometimes quite minuscule). People who are all altruism and cooperation in one game can be brutal backstabbers in another. It is fascinating. If you have a system which rewards greed and cut-throat competition while making it easier to amass power the more you have it... will you be really surprised if it ends up as ruled by a handful of psychopaths?