Just run a simple thought experiment: you have two CEO's Alex and Bob. Bob will increase the companies growth 1% more than Alex.
If the company is $100 billion, Bob will create $1 billion more a year than Alex. Over time with compounding it's a much greater effect. $10-$50 million a year doesn't really seem like a lot when you actually figure out the added benefit.
People attack Wall Street, specifically Hedge Funds but they make the system efficient (look up arbitrage). The problem with Hedge Funds is a ridiculous loop hole that lets them only pay their income at the capital gains rate. Another problem is that the government through legislation has taken away the risk while leaving the reward. With minimal regulations Wall Street profits are balanced by the risk they incur.