Yes, but the greed is limited to each corporation. I think human greed is just that; human. We aren't going to be able to legislate away from a human condition. The only way human conditions are overcome is when they affect the masses in such a way that they cause a mass rejection (as seen with the GoDaddy-SOPA event).
The problem with government intervention is that it often goes both ways, with government bailing out big business when they fail, but not when small business fails. Additionally, the problem with regulation is that it is often expensive for companies to comply with, which isn't a problem for big business, but most certainly is for small / medium business. So the main problem I have with regulation is that the problem it attempts to solve (i.e. corruption in big business) is practically non-existent in small business, and yet regulation affects small / medium business the most. It just doesn't make any sense.
The problem with government intervention is that it often goes both ways, with government bailing out big business when they fail, but not when small business fails. Additionally, the problem with regulation is that it is often expensive for companies to comply with, which isn't a problem for big business, but most certainly is for small / medium business. So the main problem I have with regulation is that the problem it attempts to solve (i.e. corruption in big business) is practically non-existent in small business, and yet regulation affects small / medium business the most. It just doesn't make any sense.