I'm going to go full-on Surrey Set.
1. They've never paid any taxes (In a lot of cases, never paid for anything).
2. Never owned/rented a property.
3. Not run a car.
4. Not paid any council tax.
5. Not had any life experiences. (Although that's not strictly true, at least half of them will be parents at 16)

The list is endless, so I cannot see how 16-year-olds can decide what the country should have for the next five years. I would argue their choice would be made on who their mates vote for, rather than any policy promises.

You remind me of that Young Ones comedy sketch about buying a pint. I can solve that in one foul swoop. Raise the ages of anything to 18. Problem solved.

Of course, no government will do that because they love teenage pregnancies. It's a fairly good chance that pregnant girls at 16 (or lower) are likely to go on to have more kids, thus potentially increasing the taxable population. This is why birth rates are a crucial topic.

I didn't think youth clubs existed anymore? I thought it was, because insurance was next to impossible to afford and the cost of security. They've just converted what was the local youth club into a smart community hub where you can get tea and biscuits and play bingo. Just the sort of place 12-year-olds want to go, if they were allowed in.