GMU is R1.
R1 unis compensate faculty unusually well compared to other institutions, regardless of other social prestige indicators. R1-level compensation is not typical of US universities, period.
> The average salary for a full professor in the U.S. is $135,000
You've grossly mis-interpreted this data.
Notice that the data breaks down salaries by the type of institution (phd-granding, masters-granding, bachelor-only) .
The average for a full professor is far closer to $91,935 because the vast majority of faculty/instructors in the US work at non-Ph.D. granting institutions.
Many professors never become full professors or become full professors very late in their career (55+).
According to your data, the average for an Associate Professor is $70,334 - 88,306, which is a better comparison because most professors are not full professors for most of their career (especially at non-R1 schools, where budgets often trump professional competence considerations in terms of full professorship appointments).
Also, many full-time instructional staff aren't professors. Instructors make average or below-average salaries (your data says $45-$57 average).
> Median personal income in that age bracket is about $40-50k
Unless we adjust for the fact that all professors have bachelors degrees, then we add 10-20k depending on your data source.
So typical professors 10-20k above average and typical instructors make maybe a few k extra or below average.
Oh, and note that this is all the upper tier of the tertiary education system. Instructors at community colleges are often doing so as a second job or scraping by on less than their students make in their first positions -- far more akin to high school teachers in terms of social status and earning power than anything else. Damn leeches...
Upper middle class indeed... eye roll
> a few people getting rich isn't as big of a concern as tens of thousands of moderately expensive people on payroll.
It is a bigger concern because it's needless waste.
We could slash instructors/professor's wages if we want to re-create our shitty secondary education system at the college level. But other than that, professors/instructors are the singular necessary input for providing higher education. Loan servicing is not necessary for providing education.