There is one thing that both the military and airlines do, that the GA sector would benefit from, safety wise, and that is some type of recurrent training once per year. I know they do a BFR, but that's inadequate and doesn't go deep enough.

I'm talking about doing a real training/review program that takes a couple days of study, a written test, then a flight check too.

The problem with that is, it takes time and money and nobody wants to spend either one, just to be a safer pilot.