Scams and Scammers

I was watching American Greed last night on MSNBC and started thinking about all the evil people out there that get consumed by greed. I am amazed that people are able to get away with Ponzi Schemes, Pyramid Schemes, Investment Scams, and so much more. They end up basically taking investors money with promise of big returns and little or no risk only to end up skipping town on the investors with their money. Now the thing that amazes me is that even after having the IRS, FBI or SEC investigate these people they don't ever get in trouble. It upsets me, but I don't know where my feelings should lay, with the scammers themselves or the FBI for being so stupid as to not stop these guys or go after them. They don't do this because technically they are white collar crimes and any investment runs risks, but it shouldn't continue to happen the way it is.