Investment banks are not really like other large companies, tho'; they're more like a a federation of independent entities. You don't work for the bank, you work for the head of whatever desk or P&L. If a head of desk makes money, no-one cares what he does, he can run his own little fiefdom, a business within a business. This is one reason that banks infrastructure is such a mess, if the head of Dollar-Yen wants something he won't wait for central IT to get round to it, he'll give his geeks a budget and say make it happen.
