To whom it may concern:
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.
(After the critical success of part II, and the strong box office sales of part III in spite of mixed reviews, will part IV finally see the June Open Thread jump the shark?)
In some cases this was an example of the principal–agent problem - the interests of bank employees were not necessarily aligned with the interests of the shareholders. Bank executives can 'win' even when their bank topples.
The principal-agent problem should always be on the list of candidates, but it can occasionally be eliminated as an explanation. I was listening to the This American Life episode "Return to the Giant Pool of Money", and more than one of the agents in the chain had large amounts of their resources wiped out.