However, I don't really get your argument. This wasn't a scheme for the government to make a profit, but it was a last ditch effort to save our financial system. The fact that it did not end up costing the the billions that everyone assumed that it would, you would think is a good thing, not an insidious plot to invest taxpayer money for profit. the govenment can force you to give them money (it is called taxes) to invest in private industry (all sorts of governemtn subsidies and low-interest loans and loan guarenetees exist, see Ugly's thread)
The government gives out loans all the time, student loans are an example. They are typically low interest loans, but if people pay them back with interest the government makes money. The government does not give taxpayer refunds on any type of loans or other programs the have a positive balance, so essentially you are getting a break when the government makes a profit on any loan program becasue it is less money they have to borrow.