Young people are dangerous because they lack experience. So yeah, let's raise the driving age and keep them from getting that experience.
Meanwhile the most dangerous people on the road are old people who can't see. But if you try to cap the driving age they'll sue and vote you out of office.
Welcome to liberal land - where the law only applies to certain people. :)
My father used to work for the DMV, California. He pulled an old guys license and refused to give it back. The State received a very nast letter from the former drivers son. I'm not sure if my father really should have done what he did, but his supervisor was not very happy with him, and later on, my dad lost his license as well.