Oh ffs. You really are old before your time R, cleaved to the myopic fascination with a fleeting golden age that never really existed, even as big history returns to the world with a vengeance. Maybe we could do with some more young blood at the ballot box, although you resemble one of those old granny's deferring to their grandkids grasp of the modern world!
Leaving aside the fact those kids have been shafted by the output of the boomer spring, and that the truly progressive changes of the 60s were achieved by their middle aged parents (e.g. Black emancipation in the US) i rather more had in mind the correlation of youth bulges with political violence, devastating warfare and social collapse, and totalitarianism ascending. Even in our day it's a significant factor in middle eastern mayhem and jihadism and is a perennial factor in Africa countries inability to escape national adolescence. None of this is on the cards at the GE but there is zero grounds for the improbable belief that youth correlates with political wisdom - but then few who seek their votes believe that it does, it's their naievete they cherish.
I'm not sure you and Aggie are aligned at all but that's for him to say; I think the hard left, the hard right, and to a lesser extent the centre left, rely on that naïveté and deference to win support with simplistic emotional appeal, for a childish worldview and for state paternalism - that is why they press for ever younger voters, and the first of those criteria is why labour were undone by their own game with Indy.