Today's metaphor

Buce at Underbelly, inspired by the mortgage lending crisis, explains something about banks.

Banks are party of a system that runs on trust, and once trust ends, the whole system unravels. So banking is the only system in which one does not gain from the failure of one’s competitor. I’ve heard people describe it as the situation you get in a rugby scrum when somebody loses his pants: all the players mill around and make a racket while the unfortunate recovers his dignity. Then they give high fives all round and charge off again down field.