This report from The Economist is right in line with what we have been saying for years here. People with advanced degrees who are not prospering are often deeply resentful, certain that something must be wrong with "The System"*. I have worked with them for years, MSWs who believe that in a just world they would be entitled to the salaries that other people with their number of years of education get. Other measurements, such as relative value to society, difficulty of the task, level of risk, and the like do not factor in. This is my Arts & Humanities Tribe* discussions from the early years of this blog. That they may have been lied to by the educational establishment or their upper-middle-class expectations ("For a good job, get a good education"), that they may have made poor economic decisions due to Following Their Dreams™, or that they may have chosen one of the easiest of Master's degrees to pursue does not occur to them. It is largely political, cultural, and attitude training. This holds for other Arts and Humanities degrees, with similar resentment.
I used to number among them. I resented a system which did not reward me as I thought only made sense. I did not see that I had made trade-offs or that my less-attractive qualities undermined the value of my stellar abilities. It was all just unfair.
This undercurrent plays strongly in American politics, and I think throughout Western societies. People who fell for the various lies of their tribe that did not mirror in the world at large are certain that there is something wrong with the system. I have described this as one of the driving forces of feminism, that the lies of the educational establishment about what the rules of success are, or at least should be, is infuriating to the women who believed this, succeeded and even dominated at the "school rules," only to emerge into a society that has always played by other rules in terms of money, prestige, and power. That outrage is common to all who went that route, including a few ethnic minorities.
*Lots of further links at both posts, if you want to go down those roads. I think you should, but then, I am biased in thinking that all these observations are worthwhile because i made them