[quote=@rush99999]
Sounds good to me, though I should note that kleptomania isn't one of his flaws. His flaws are actually cowardice in the face of defeat, a weakness for vices of the city (especially alcohol), and the fact that he considers being a gnome to be a fate worse than death.
[/quote]

Ah, but money, AKA gold coins, are part of the vices of the city. More gold means more vices. 

Plus, Brutrumukk has shown that he is pretty greedy. He's hoarded a lot of items he came across or received, and still has them if they weren't stolen by Agdon or lost them to the bottom of Downfall's Lake. 

Not to mention his reaction when first seeing the gold in the cave.