Its a shit job and anyone who can does something that is less stressful and pays at least as well. Same thing happening to teaching.
Got some source on that?
Wasn't that because they were finding people above 100 IQ were quitting the job within a couple of years, so that led to too much instability in the ranks?
Conspiracy theory? I think you mean the obvious truth:
https://en.wikipedia.org/wiki/Superclass_(book)
The author is heavily linked to all the elite institutions, so he isn't talking out his butt:
https://en.wikipedia.org/wiki/David_Rothkopf