„Teaching conditions in the United States have deteriorated over the last decade and currently compare poorly with those of other nations. Unlike teachers in many Organization for Economic Co-operation and Development (OECD) countries whose salaries are, on average, comparable to those of other college graduates, U.S. teachers are, on average, paid 30 % less than other college graduates. […] U.S. teachers’ wages have declined relative to those of other college educated workers since the early 1990s, when they were at their most competitive – and when teacher attrition was much lower than it is today.“
Univ.-Prof. Dr. Linda Darling-Hammond u. a., Breaking the cycle of teacher shortages: What kind of policies can make a difference? In: Education Policy Analysis Archives Vol. 27 No. 34 (2019), S. 4.