"Those who can't, teach" is the result of systematically underpaid teachers. There are two groups who go into teaching: those who like it so much they're willin

"Those who can't, teach" is the result of systematically underpaid teachers. There are two groups who go into teaching: those who like it so much they're willing to take less pay, and those who are drawn to the profession because the pay is competitive with the other jobs they're capable of. Money is not sufficient to overcome the problem on its own, but it is necessary, and not having enough of it caused the problem.