What I've done once in a HeroQuest game set in the Star Wars universe is this: The players are a comando from the New Republic and they went to a backwater world trying to find a hidden man. They received some money from their superiors to use in their mission, but once they were in the planet, which was in Hutt space, they were effectively cut off from external resources, so it's finite. They had a new skill at a set rating and every use of it (to pay an informant or bribe a custom officer, for example) would give a cumulative penalty to the skill until they leave the planet.
I've only feel the need to do it once.