That's a problem of visibility, though. No one in management currently cares much that the delegator is actually the one 5 times less efficient in the long run

That's a problem of visibility, though. No one in management currently cares much that the delegator is actually the one 5 times less efficient in the long run (or just the one leaving the rest of the team with years of technical debt). The exact same thing was the case with the outsourcing hype. Of course, nobody learned their lesson because those managers who messed everything up were long gone by the time the bills came due and everything broke down.