You know how some bases have bushes that can broken which drop gralats? It would be epic if the leader and the people the leader gives the power to could lock gralats like in houses on classic so that the gang could build a huge gralat collection and inspire other gangs to attack them so they can steal there gralats.

Or maybe there could be a treasure room with objects that could be hit and when the objects get hit they drop gralats at would all be put into a gang treasury.(When you view the gang you could see there total $ in there treasury)
With this money you could put bountys on other gang bases, give some to your members etc.  

I think the money you get from the treasury should only be used for gangs not for players, you could buy more gang space or a cheaper, easier way to add allies and rename guilds.