You realize that we over-burden and under pay teachers as it is, right (although I'm sure you'll disagree with both of those). As someone who has spent time in the classroom, its nearly impossible to meet all the needs of teaching, let alone being some sort of psychologist for students. You need paid professionals for that. If you want to get those people more involved in school--and they once were more involved than they are now--we need states to stop cutting money to education and stop emphasizing tests so much--tests that necessitate a ton of money and administrators to run.
Schools bear a lot of burdens. We expect them to teach, to baby-sit, to be psychologists, and to remedy and fix a lot of what is wrong with America. And then when they can't fix everything, we cut funding to them, exasperating the problem.
I'm sympathetic to your idea, insomuch as we don't expect the teachers to do more than teach, and we bring in other people who are professional to figure these other things out.