The Gold Coins
I really like the idea of a ready made currency that is universal among the criminal underworld, but there are a few uses of the coins that really make me scratch my head. The uses in question are the fees for the cleaners, and entrance to the secret bar. It seems one gold coin is good enough to get a single body disposed of (and they even clean up the place for you as well, what service!) as well as getting you into the bar for seemingly one night. It seems that either the cleaners are getting underpaid for their services (the little old guy had a bunch of employees) or the bar is getting overpaid in their cover charges. It's a ticky tacky thing to point out, but its something that's been rattling around in my head since I watched it again in preparation for the sequel.
Take your flunky and dangle.