Question - are underprivileged kids going to be better off or worse off with teachers now being incentivised greatly for their performance and their rapport with students?
Perhaps, teachers in a decile 1 school might find it more difficult to earn 80k a year under this scheme, but at least the opportunity is there and where there is opportunity there will always be those who rise.
As it is now ( with 4 teachers in my family who obviously love this policy ) the only monetary reward teachers can hope for is a chance at moving into a leadership position - essentially the teachers who are performing well and are considered for a promotion can now, through this policy be rewarded without having to leave the classroom where the real work with students occurs...
The opportunity to work 60 hour weeks and earn under 60k did not sell a lot of great candidates on the idea of going into teaching, perhaps this might?