That's never been my experience. I've seen people add tons of quantifiable value to a business, including dock loaders, customer facing staff, and even cleaners but in spite of their value being quantifiable they weren't rewarded. Clients and customers would literally say that staff is why they came back, but nothing.
Your post seems to be largely a THEORY of why salaries are set the way they are. In my experience social "value" seems to be a far bigger indicator of future salary rather than actual historical value. Meaning people are paying for perception, not measurements.
You can see that just by looking at affluence typically white kids flowing from private schools, to named colleges, straight into the financial sector. When did they generate historical value for the business when they were hired at double the natural average salary?
