I have seen such schemes posted before....
It begets the question why would anyone go to work in a school for the retarded? They have no monetary future beyond low skill/wage jobs if they are even employable at all.
The converse in high performing suburban districts will benefit substantially.
Further...then it becomes servitude for the student who can never escape the bondage to these teachers.
Where does it end?
If my SD graduates 100 kids a year, in 10 years, a thousand are (hopefully) in the workforce (incentive for a teacher to really teach a kid to actually want to work or .... God forbid . learn to be a capitalistic entrepreneuer, based on Aristotles mean, that he learned IN SCHOOL .... etc.
THOSE are the kinds of thoughts I'm thinking
If a teachetr teaches .... from kindergarten up to graduation ... he/she can pack his own chute by really teaching.