Of course he supports it. The thing is his plan, tax increases included, rebranded.
This seems like more than 3 income brackets to me and I imagine the middle class will pay the 22% and I mean people who earn around 60K which seems to me to be around the same as with Clinton. Also they are still keeping the Earned Income credit and they will be lowering deductions for mortgage interest and 401ks.
Sounds like this is in the governments favor