There's a long discussion on that very wealth issue
here, with plenty of anecdotes and examples of how "sharing the wealth" works in play.
In the end, it doesn't seem terribly different from any other form of group strategizing to maximize resources. Everyone benefits from the money guy's wealth, or the cleric's healing spells and discount holy water, or the druid's discount healing potions... but those benefactors have to sacrifice CP to make it happen, and all kinds of fun trouble can result when the sole financier (or sole healer or whatever) decides to start calling in favors, or gets taken out in a fight.
All in all, I think the game handles this situation just fine by letting the players scheme as they like (and reap whatever comes of it).