He isnt ruining his career. It will all come in time. I wouldnt even doubt that they will just put him at the same position as me when he does finally get the promotion. This is the way the kids get more money. BM uses extra money on herself. She doesnt pay for anything extra for the kids. The last time her other ex got a raise and her child support went up she went on a vacation without the kids. Would you honestly want to fund that kind of stuff?
The extra money we had because I took the raise instead of DH went to a very nice family vacation and the kids able to do more extra curricular activities. That would not have happened if BM got the money.