Michael Lewis is correct Wall Street trading policies should be changed or modified to benefit the average investor (the "little guy"). The idea that large traders who can afford to pay for the location and bandwidth can front run trades on the "mom & pop trader" investing from home on the Internet is fundamentally unfair. We all remember the results of the "Flash Crash."
I do not believe the high speed trading on Wall Street is the problem. Yes, the stock market is fixed and controlled by a few, but those who speed trade are just trying to make a living off a vastly dangerous market. We should pinpoint the real trouble makers, not the people who only make a small profit.
Giving the fact that is how most people make their money, Keep it the way that it is unless there is default in the way that it is now, if people are starting to loose more money because of the way that it is now than yes, change it to where many people can make their money.
I think that Wall Street trading should not be changed just because some guy comes up with a fancy high-speed trading. It shouldn't be that way because when he came up with this idea, all the trading rules were already set and everybody must respect them to avoid anarchy in Wall Street