About your last "edit" paragraph: You can read more about it here: https://www.epi.org/productivity-pay-gap/

TL;DR: Productivity–Pay Tracker: Change 1979q4–2024q1; Productivity +80.9%; Hourly pay: +29.4%; Productivity has grown 2.7x as much as pay

Also, if people are unfamiliar with economics term "productivity", it roughly corresponds to profit per employee, or better, return on equity (ROE).