Uh, because they can be fired only by the same boards that hired morons like Pandit, O'Neal, Lewis in the first place. In a capitalist society those banks would be bankrupt and replaced by companies that can actually make money instead of losing them. Alas, they are "too big to fail".
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"If you keep making fun of me, I might just get pissed and not post on here anymore. Start taking me seriously. I'm a student now" Fatja