What usually happens is basically what Maynard said, but at the same time you're wrong.
Not all of the money goes to the developer when you buy a game (obviously,) after talking to a few people at the local gamestop a long time ago I found out what actually happens. They give the developer a number of copies they want, pay part of the price (aka the price to manufacture the game,) then, once those copies are sold, a percentage of the profit goes to the dev.
Anyways, PS3 is on its way today, only going to have Uncharted 2 for now, if anyone wants to play I'll post up my PSN as soon as I make it lol.