Mining fees have been lowered before and they will lower again. Some miners can join a pool which still charges higher fees, but they will be beaten by the pools with lower fees and more miners. Eventually they will never find any blocks and they will give up and join bigger pools (with lower fees) or stop mining. If miners become too greedy they will not last.
Yes... that was what I was talking about. Even during the last time, there was a lot of opposition from some of the major mining pools. The next time, the opposition is going to be much more vocal.