It seems we've only seen the tip of the iceberg with the Barclays Bank prosecution for rigging the LIBOR (London Interbank Offer Rate). It seems that they are cooperating to avoid jail time. Bob Diamond who headed the bank until recently said "he was sickened when he saw the emails." What he means is that he was sickened that his underlings were stupid enough to leave a paper trail. His nausea will be somewhat soothed by the $3.5 million he gets as a golden parachute. This, however, is about a tenth of what he expected to get. How will he make the payments on his Rolls?
From what's coming out it appears that all the big banks were doing this. Not a huge surprise there. That was the whole idea of deregulation, or rather decriminalization. But they weren't satisfied with skimming hundreds of billions a year (trillions over time) from the world economy. These "smartest guys in the room" managed to bankrupt their own rigged casino.