I disagree with this, since I got my license at 16 I have been a very good driver and have not once been pulled over or gotten in an accident I do, however, think that people should have to be 21 to buy alcohol, but 18 to consume it. Kinda like tobacco where you have to be 18 to buy it, but 16 to use it.
I honestly think that we need to stop basing maturity off of age. There are some really stupid reckless sixteen year olds, and there are also responsible ones. I think the drivers test should focus not just on driving but on maturity and reactions to certain situations.