A couple of comments. First I don't think that jail time cures anyone of alcoholism, and I think many DUIs are a result of that disease (My personal opinion is that repeated DUIs are committed by alcoholics). So stick them in jail since it gives some us some satisfaction -- we punished that guy -- but don't confuse that with making them less likely to drive drunk again. Second, getting a buzz on impairs your ability to drive safely, so "I just had a couple of drinks" can also kill innocent people in the other car. I don't think anyone should drive after even one drink. And finally, what is this with teaching 14 year old kids to drive? I assume that is for emergency situations, not to permit them to drive at that age to the store and get a carton of milk.
Learner's Permits and School Permits allow drivers as young as 14 and 15. There are limitations as when they can drive, where they can drive, for what purpose (often for school functions only), limits on how far they can live from school, and I believe that only family members are allowed as passengers. Not saying though that these permits aren't abused.