Well, he needs a definite going over, medically-speaking. But taking away licenses is going to open up a lot of other cans of worms. Like what to do about elderly who don't have access to mass transpo/taxis/friends/family members to get them where they need to go. Not to mention that it's good for folks to get out, both mentally and physically. You don't want them becoming shut-ins. I don't see a whole lot of planning for that, either.
Who do you think is responsible for that "planning"?
I see nothing wrong at all with taking away licenses from the cognitively inadequate. Quite the reverse.