[terio]

Warren Buffet likes to argue that he does not make risky investments. With that in mind and under the light of how profits are made by the financial sector, it is pretty clear that when they make risky investments it is mostly with the client's money. The rest is just friction, like a toll booth.

[ForHackernews]

This is the key point. The wealthiest people on Wall Street are glorified middlemen gambling with somebody else's money and skimming cream off the top.