Please explain

Can someone explain to me why I (as a taxpayer) am going to be forced to pay for someone else's bad mortgage decisions? Seriously this whole thing is really starting to piss me off. Our government just keeps bailing out and bailing out all the people making bad decisions. I'm sorry but if your a bank or investment firm or whatever making huge risk choices giving tons of people money that can't pay it back, then you kind of deserve what you get. How's is bailing everyone out going to stop this kind of thing from happening again? Clearly it won't it will just incourage such behavior. This shit really makes no sense to me.