“Purchasing power” is the metric I’ve been thinking about.
This decline in purchasing power means low-wage workers have to work longer hours now just to achieve the standard of living that was considered the bare minimum half a century ago. epi.org/…/raising-the-federal-minimum-wage-to-15-…
Here specifically is the web page I’ve kept in mind when referring to productivity (and I admit that off the top of my head “the 70s” was a bit off).
In fact, had the federal minimum wage kept pace with workers’ productivity since 1968 the inflation-adjusted minimum wage would be $24 an hour. aflcio.org/what-unions-do/…/minimum-wage
I concede that “young adults” and “low wage workers” shouldn’t be confused.
I’ve edited my previous comment. Thank you for the point.