You want to know who is against stricter testing for driver's licenses? The powerful auto lobby. It would diminish their customer base if everyone w/ a pulse could not get a license.
I am actually not as ideologically driven as some of you may think, (but it's OK to think what you like),

, just common sense and balance between competing interests is the name of the game, IMO. It will always be that balancing act w/ our system of government, let's take some of the power back from special interests.