Just because it's already competitive doesn't mean the best people are competing. If you're really good at math, you can end up with a full 10x difference on di

Just because it's already competitive doesn't mean the best people are competing. If you're really good at math, you can end up with a full 10x difference on disposable income being a teacher versus other available careers. There's no way we're getting the best people or anywhere close to it into education, competition or not. (Your point about the difficulty of measuring performance is a very good one though)