Or it is a reference to everyone apparently needing to go to college etc, and there being a nationwide shortage of people entering into trades, mechanics, fabrication, machining, etc. All the “bad” jobs you should stay in school to avoid.

Turns out we live in a built environment, not everyone can sit in a cube.

Maybe it means fewer people being born in car-producing and exporting countries.

It is wages accelerating to a living wage and past that because of the fertility rate curve. Similar to a bond curve, but expressing productivity available.