The failure is more that of policy ; SG motivates all of the workers supporting traders by dangling in front of them the possibility of becoming a trader. Those new traders then know the bugs of the system they are not supposed to abuse.
And of course the mythology of the trader, the superman of the All-Powerful Market, is problematic in its own ways. The power these guys wield is astounding ; and for them it is often a game. Auferre, trucidare, rapere, falsis nominibus imperium; atque, ubi solitudinem faciunt, pacem appellant.
Also, there aren't that many people who know all that well the workings of the financial markets, and the computer tools user by the SG (which are mostly done in-house). Taking somebody from the middle or back offices, or support, is cheaper and faster. Auferre, trucidare, rapere, falsis nominibus imperium; atque, ubi solitudinem faciunt, pacem appellant.
It would be fab if you get him to join ET: Jerome a prison. His book title: The trillions I saved SG in future losses. Our knowledge has surpassed our wisdom. --Charu Saxena.
In these cases, it becomes very apparent that our system is profoundly iniquitous, as the bosses are rewarded for the work of the line workers. It's not a popular view, but my opinion but such conditions breed a certain kind of crime amongst the workers, because it violates human notions of fairness and decency.
many hundreds of times beyond their salary
The estimates on the positions I saw are 50 billion euros. That was five hundred thousand times his salary... (And as a computer programmer, it is demoralising to see those figures passing arounds. Thankfully sometimes one realizes the currency is roubles or yen where eleven figures numbers aren't that huge amounts) Auferre, trucidare, rapere, falsis nominibus imperium; atque, ubi solitudinem faciunt, pacem appellant.