Oh, believe me - I always thought "Man, if I make (x) amount of money, I'll be SET" - but everyone's finances are their own. Back when I would spend money as quick as it would come in, I would have one of the better upper class rigs of my gaming group. Now? Core2Quad with a GTX280. Why? I have other priorities as well; paying off all of my debt is becoming a BIG priority even though I'm years away from retirement.
My point should have been more to - if you are into gaming and can afford to shell out the bucks for the big name games, then you probably have some income that you can save or just outright spend on a larger drive, spinny or SSD. Hence, buy a bigger SSD or HD. Simple solution. If not, then don't buy a game that has such large requirements and save up until you can.
Besides - even if you don't buy a larger drive, well... then offload some games? There's solutions; potentially sub-optimal for what you want to do. At this point it isn't like the creator/publisher is going to go back and re-do all of the sound files, right?