The author apparently has no idea how to do CPI calculations. She somehow seems to be calculating inflation adjusted wage increases to CPI changes. Rather-- Median Family income in 1970 was $9,870 [0] Median Family income in 2021 was $79,900 [1] CPI in 1970 was 38.8 [2] CPI in 2021 was 271.0 Ratio of incomes = 8.1 Ratio of CPI = 6.98 So household income has increased more than inflation. Median household income might…
Measuring in households and not individuals hides a large number of changes in how people are paid. It also doesn't account for things like pensions, which were common in the '70's and earlier.