fear of impotence perhaps?
In the case of greed and extortion you can say that the fear of not feeling good or fear of neglect is the motivation.
Depression:
Greedy hog: I don't want to mop up the mess from this leaky ceiling anymore. This house is falling apart. I better get rich!!!
neglect:
Greedy hog: I don't want to live in the gutter and I don't want my family to think i'm a loser. I better get rich!!!!