What happens when there are no more entry-level humans to be promoted to mid-level, and so on?
No business cares about that question, just like the Onceler didn't care how many Truffula trees were left. It's not their problem. Business is business, and business must grow, regardless of crummies in tummies, you know.
(i.e. this cynical complaint is exactly the opposite of the cynical complaint about managers/directors engaging in empire building.)
Since this isn't the 1800s anymore there won't be any major revolutions but I expect way more societal violence going forward. If you have no hope for the future it's not hard to go to very dark paths quickly, usually through no fault of your own sadly.
Now add how easy it is for malicious actors to get an audience and how LLM tech makes this even easier to do. Nice recipe for a powder keg.
I'm sure they were saying the same thing in the 1800s
what if we all just blame the youth?
I think that might fix the situation
Other than that, I am guessing junior roles will move offshore to supply the body shops where the corporate IT work has been going.