edit to add: This whole thread now feels like defense of the Efficient Market Hypothesis. We have an entire industry facing a stricter regulatory framework that increased demand for captains while fewer humans are being born in the U.S. This is a shortage.
I get that one can just increase wages and immediately get more cashiers or burger flippers. Other problems have more complicated dependencies.
edit more to add: I realize now I did not fully appreciating your argument, which is that there is never a shortage of anything?