I don't think good teachers are overpaid, but I do think there are a lot of people teaching who are a drain and dead weight on the tax payers.
Good teachers don't need public sector union support. However, the ones who have no business in the classroom do.
+1
In my experiences at school, it seems that the majority of the teachers there actually do belong there and need to be paid more for their efforts. Then there are the other teachers, who don't actually teach and are as dumb as a stump. I have no problem with teachers being paid much more if they have to take STRICT testing every year to qualify as a teacher.