Replying to How will Obama pay for the public option?

before i start i want to say that i am not bitching about healthcare. im a liberal but that doesnt mean im gonna blindly accept everything obama says. Im asking cause i want real answers

I am very supportitive of the concept of a public option, but i cant understand how its gonna be paid for. Obama says that he's not gonna raise taxes for this and that most of the money can just be found like laying around somewhere. I find that hard to belive. can someone explain this to me