This article is over three years old, but its story is quite interesting and its message profound so I thought I'd link to it now. It's the story of Blaine Lourd, who got rich as a stock broker, but later changed his tune when he realized he was nothing more than a salesman pushing companies for no particular reason other than making money for himself. He wasn't serving the best interest of his clients. Eventually, he decided to take action and now only recommends Dimensional Fund Advisors' index funds to his clients.
It's a fairly lengthy piece, but definitely worth the read. Check out The Evoluation of an Investor by Michael Lewis, the financial journalist who has written for Vanity Fair and The New York Times Magazine as well as published several best-selling books, on portfolio.com.