Get rid of the age restriction all together. If you can hold a first class medical, then you should be legal to fly. If you don't believe a first class medical is stringent enough, then up the standards.

This is the only career I can think of where there is blatant age discrimination. For the record, I adequately planned for retirement and plan to retire between 55 and 60, but I cannot stand that some of my friends are being forced out.