They should be used to lift up communities that aren't doing well but then they should stop. For example, places New York that are already doing well should never offer subsidies.

I guess this should be a general principle. Give subsidies only to entities who need them and take them away once things are better,.

Why not just spend money from tax receipts to lift up communities instead of giving this easily corruptible power to people?

It's probably the same in the end.