Could be wrong, but my guess is these instances involve someone not getting a promotion or someone getting an undeserved promotion - something like that, which would tick off those who want to move up on the gravy train express the U.N. has become. Not suggesting there was or wasn't sex involved, or sexual harassment as defined by law. Don't know. Just believe it was about advancement or lack thereof, back of it all.
Maybe the cheese of sleaze didn't pay off on "services rendered."