A teacher in South Dakota with a bachelor’s degree and 10 years of experience earns $33,600 per year, which is less than the average auto repair worker. This grievance against salary injustice is nothing new, of course, but this particular example comes to us from a new national study by the Center for American Progress, which details the chicken feed teachers are forced to subsist on as they altruistically keep your hopeless children literate.

Teachers are underpaid. In politics and also in everyday life, this is almost universally accepted. Everyone admires teachers. Everyone wants good teachers for their children. And naturally, liberals believe that contrasting these salaries will emphasize the irrationality and unfairness of the marketplace.