Gold

Gold sucks. There's over 7 billion gold in the game. Any ideas what to do with it?

I won't really want ideas to pull large chunks out of the game. What I'd like everyone to do is think in terms of:

"What if there was ZERO gold in the game? How would we keep it from getting out of control -AGAIN-?"

This does NOT mean we're planning to remove everyone's gold, I just want everyone thinking along the lines I want them to ;)