I personally know some of the geezers that shouldn't even drive a car. one of them barreled up and down the interstate in a class A. Maybe you have seen the resistance to re-testing senior citizens. As needed as it is, this would be the resistance that I was talking about. It would get totally political.
I agree on the $20 $50 licensing if only the government could be trusted to keep it at that rate. Check with your trucking buddies. The government taxes, titles, and fees them to death.
The problem, as I see it, is the same one I have many times. You are looking at the problems logically.