Maybe because some improvident old hippie has won't pass the torch and retire?
The workplace is inhabited now by greedy geezers in engineering, finance and the sciences and the greedy old bastards wouldn't hire any replacements in the 80's and 90's.....
Whoa boy, don't get me started ! You wouldn't believe the people I've seen in their 60s and 70s that are still hanging on by a thread at their job and are keeping a perfectly qualified person from filling that job. The vast majority of these folks, just from what I've seen, 1. can't use a computer 2. can't type 3. take forever to do anything. Yes I know, it sounds like I'm a jerk.
Here's a good example. Does anybody watch the business shows on Saturday morning on Foxnews? I think it's on Forbes on Fox. Has anybody seen that OLD guy on that show who's so old he slurs his speech? Come on buddy, RETIRE! !