Jewel of the North
Yugoloths are all about the money. CREAM. They actively pursue the status quo to keep the money train going. Yugoloths will actively disrupt world domination because no war means no war profiteering.
And that's all good. For my part, I think that having them based on greed is boring, I just cant understand (heh!) why a race would need money when they live in the hellhole they are. But then you have Mammon whose whole deal is greed, and is a Devil lord.