Here in new zealand, we used to have the drinking age at 21, recently it was lowered to 18, this has not proven to be a good thing, now even younger ones are getting into the night clubs etc, yes they are meant to check, but talk to the young ones, piece of cake they say, the nz government is considering raising it again, well there has been a whisper that they might, hmm i wonder how that would work,
u can vote at 18 here
drive at 15, u have to get a learners licence first, then a restricted for around 18 mths and then complete another test before u get your full licence, however that might be reviewed or has been too.