You're generalizing too much by averaging averages, so that your numbers are off. Salaries depend on university, campus, field, etc. These are average salaries

You're generalizing too much by averaging averages, so that your numbers are off. Salaries depend on university, campus, field, etc. These are average salaries over 5 years ago: "The Daily Californian created a database of professor pay-checkers in 2016 that shows the variation in inter-departmental salaries for the 2015 year. For example, average professor salary was $326,230 for the economics department, $202,711 for the electrical engineering department and $163,035 for the English department."