Maybe, to increase the importance of funding we can make the money you get from certain items decline. That way players will be more anxious about what they get from a raid. Not sure if it could easily be worked, but it'll be like colonization. You might even want to create extra storage until market prices go back up?
While I'm on this topic, surely it would be good to retain some of the weaker weapons even in late games? I'm irritated that no alien uses plasma pistols any more. Can this be redone so that non soldier types have a higher chance of owning pistols? And maybe even medics? Navigators, engineers and leaders?