I was hoping for an answer but alas there was none. Anyone have plausible theories? Is this an unexplained mystery or just an artifact of S curve growth?
It was a time of rapid change. That particular website is usually used to suggest that the only thing that changed was the gold standard, but it's been debunked and refuted all across the internet.
> ... observers from the 1950s to today repeatedly noted that, at one time, social rules curbed CEO greed.
https://corpgov.law.harvard.edu/2016/08/18/executive-compens...
Other sources -- sorry no links -- ascribe the genesis of such "social rules" to a US WW II norm of austerity among elites, who might otherwise have found ways to seize a greater share of the economy's wealth for their own dissipative pleasures.
Energy volatility and energy austerity https://pbs.twimg.com/media/FPjE8zVX0AQCFuD?format=jpg&name=...