Of course the unstated reality appears to be that
it works. That is, the middle management was not necessary. Elite students really do make better executives than former burger flippers and rivet drivers.
I know some corporations still maintain a culture of promote from the bottom, but they are the exception. It's nice to think that hands-on experience would give companies an advantage, but let's not conflate our desire for how the world ought to work with how it does.
I see this as yet another way in which capitalism's brutal efficiency finds more and more things to trim.