The whole 'undeveloped brains' thing is a myth. The brain is still developing and even then developing != deficient. As for improving the state of democracy? It seems like very much a good thing that they'll be able to have their interests represented, which is a rather stabilizing force. Especially when dealing with idiots who vote for Brexit and then think that literally enslaving the youth for the sake of 'instilling values' and calling it 'national service' is a great idea.