It has more to do with changing supply and demand for skill, the race between education and technology, globalization, probably more unequal access to skills in the U.S., where you have very good, very top universities but where the bottom part of the educational system is not as good, so very unequal access to skills, and also an unprecedented rise of top managerial compensation of the United States, which is difficult to account for just on the basis of education.
Puno više veze ima s  promjenom ponude i potražnje za vještinama, s utrkom između  obrazovanja i tehnologije, s globalizacijom, vjerojatno s izrazitijom nejednakošću pristupa vještinama u SAD-u, gdje ima vrlo dobrih, vrhunskih sveučilišta, ali i gdje niže razine  obrazovnog sustava nisu toliko dobre. Dakle, vrlo nejednaka dostupnost vještina zajedno s neviđenim rastom primanja visokog menadžmenta  u Sjedinjenim Državama, što je teško opravdati samo obrazovanjem.