case like Jerome's are the exception

I'm not sure that's true. Most of the employees in the banking sector - even of the minority engaged in front office activities of wholesale banking (as opposed to overwhelmingly boring retail banking) are engaged in mundane and necessary tasks. The number of people engaged in trading and speculative investment activities is not that large - it's just that they are the most idolised, "sexy" and talked about, and of course that they capture disproportionate fractions of bank income.

In the long run, we're all dead. John Maynard Keynes