On 7/20/2016 8:44 PM, wrote:
There is no data showing having all GA pilots take a 3rd class medical
has accomplished anything.

That's the real take-away point. After doing this for (what? a half
century?) there is no data that shows that the third class physical does
anything to reduce accidents. At the same time, we have parallel
populations of pilots, glider pilots in particular, that have long
operated perfectly well without any requirement for physicals.