I have, unfortunately, too much inside experience personally or via close friends of working inside NATO, UNICEF, and the ECB. All of the are dysfunctional, soul-destroying places where talented, highly educated people pass years without accomplishing much, all while drawing excellent salary and conditions. Many people hate their jobs inside these organisations every day but won't quit because the financial rewards are too great.
There was a strange kind of resigned fatalism among the old-timers. When I started voicing my discontent, I would hear the same sentiment from older colleagues: "Oh yeah, I used to say the same thing when I was younger, and then in the blink of an eye, it's 20 years later and I'm somehow still here."
I got out.