And with that one comment, you lose the debate.
Let me explain something to you. Teacher turnover is a SERIOUS problem. Serious enough that it significantly hurts teacher turnover (see a very recent study here.) Serious enough that teacher turnover costs, according to Forbes, $7.3 BILLION per year. As if schools needed any more problem, the conditions that encourage them to leave are KILLING are educational system, FAR more than this so-called "bad teacher problem" does. But armchair critics will never acknowledge this (lest they cease to BE armchair critics).