Dunno, the old school "we'll get you started in the mailroom, and you can work your way up by gaining knowledge about the organization while demonstrating competence and professionalism" sounds like a pretty solid hiring strategy.

Although tbf I kind of doubt if this was ever really the case - probably this is imagined nostalgia for idealized bygone times. And given that this is a strategy that requires, y'know, long-term investment and planning, it's not like it's going to start happening anytime in the near future