I have a brother who had a career in banking. He passed ALL the subjects in the Institute of Bankers exams (I recall there were 20 or more) and followed those by gaining a banking diploma.
When he became a branch manager in his early 40s he was asked to be complicit in corrupt practice which was/is prevalent - he left banking.
You cannot convince me that the banking system has not corruption at the core of its operating practice -
Central Bank Corruption Insider Trading and Scandals
Banks | Global Witness
Banking scandal: 'the rot was widespread, the corruption endemic' | Vince Cable | Comment is free | The Observer
The moral corruption of the banks is poisoning society | Mail Online
To Entwisi - Is there really any excuse to participate? - that didn't provide an adequate excuse at Nurenburg. Participation implies complicity.
To Grum - I would find it embarrassing if you respected me - I don't seek it, and care nothing of your opinion of me.
You say that banking provides an essential function in our society - it has reduced populations to below poverty levels, yet you find it wholesomely acceptable - a better way of trading must be developed.