At the high end of the white collar market you're paid to deliver impact and your pay is determined by the quantity of the impact and how differentiated it is (no big bonuses for the guy who presses the "print a million dollars" button).
Sounds like the skills aren't very differentiated. IME it's quite rare for a business to miss differentiation in business impact in an order of magnitude.
Going to your earlier question, the candidate in question has many skills but is not overly specialized. He commands that price because he can point at the right place in the stack and say "There's $10 million in savings here" when everyone else misses it or "Changing the architecture in this way lets us ship 6 months faster" and he is able to do this repeatedly.