My wife works in primary-age education, and is fiendishly smart and academic, with a degree from arguably the best university in the world, again with a tilt to

My wife works in primary-age education, and is fiendishly smart and academic, with a degree from arguably the best university in the world, again with a tilt towards maths. She could have easily gone and become an actuary, an i-banker, or a management consultant, but she didn't, because she wanted to be a teacher. This decision costs us ~$100k a year as a household. Schools are able to hire people like my wife at below her "market" value because you don't need to be anywhere near as smart as my wife to be a teacher, and because there are couples like us who can walk away from more money for the improved lifestyle. Why would a responsible organisation pay more?