I am claiming that a significant number of people who would make great teachers probably don't want to be one because pay and quality of life is much greater in other lines of work. If we, as a society, want the best teachers, then we have to make that a viable option for the best people. An uncertain school budget, beaurocratic school administration and myriad legal and funding issues don't make for a good working environment. I haven't heard any parent proudly claim or want their children to become teachers.
of course, maybe I'm wrong about increasing quality of teachers will increase quality education, but I think it's a good place to start.