Even if interest rates do not decline, the empire builders will only migrate from current set of tech companies to other companies that are seeing a boom.
Remember, the goal of management is not innovation or working in specific industry. It is to build larger empires and to climb up an arbitrary ladder.
I've gotten the impression that some startups hire a bit many people (to impress investors, and friends/peers?), otherwise I haven't heard about that.
I'd thought shareholders of public companies, though, care more about revenue and mostly don't know how many employees each company has? (And that primarily middle managers are doing the over-hiring?)
If you have a link where I can read more :-)
It's the policymakers and society in general that should learn. A decade of low interest rates together with outsourcing of everything that can be outsourced created hordes of useless people that add little value and feel entitled to their salary. As you get more and more of those, the value of money decreases, and inflation starts piling up (COVID accelerated it nicely, but things like housing, educational and medical were off the charts for a long while).
The hangover from those rates will last longer than most expect.