earning income power

[http://dummy.us.eu.org/robert (Robert)]

https://www.youtube.com/watch?v=ShGT-fY7S98

"Permanent" seems like such a strong word.

I was interested in the chart showing generational degradation of income
earning power.  A personal testament: I did a calculation about 4 years
ago and found that I was (and, presumably, still am) earning less than my
dad did at the high of his income, adjusted for inflation.