Everyone knows that in the corporate world you put the idiots where they can do the least amount of harm.....management.
Sounds like this guy doesn't know anything. He probably knows how to reconcile numbers and kiss ass appropriately. If you have the opportunity to promote an idiot to management it's a certainty that the yes-man is first in line.
Loki, from my standpoint at least, is right on the money. If you can't tolerate the idiot tell the bossman about him and his ineptitude and then walk away.
If the guy is smart.....which he probably isn't, but if he is.....then he'll offer you a viable solution. Unfortunately, even idiot management gets promoted, usually to a higher management position.