A fair economy for a game with a large number of players, in an online setting, without dice to determine winners and losers, is a fucking mess. I just don't think it's possible, either.
Sooner or later, on every MU, you're going to come across PlayerA thinking it should go one way and PlayerB thinking it should go another. If it's about story, then the resolution of the scene comes down to PlayerA vs PlayerB, not CharacterA vs CharacterB. It's ultimately an argument about who is right and who maintains creative control.
It takes a very tight, very team-based environment to survive that. This is, IMO, why so many of these games turn into throat-punch festivals. When it's down to deciding what the players want, no one wants a 50/50 coin toss or some staffer who is ultimately going to be called out for potentially playing favorites to be the tie-breaker.
Light systems are great for this, too. Light systems are harder to hack, like FS3, but still allow some measure of IC challenge/conflict resolution to keep things IC and not being hashed out OOCly.
But, then again, we've all seen plenty of examples of players refusing to accept the IC resolutions, even when dice have determined the results. For this hobby to work well, it requires a fair-play understanding that sometimes, CharacterB won the scene.
and we have derailed the fuck out of this thread
EDIT: I am also proud to announce that this is my 1000th post and I have EXACTLY 1000 upvotes.

I AM KILLING IT NOW THAT THEY TOOK AWAY THE DOWNVOTE BUTTON.