The problem should have been headed off long ago. In the 60's the pill and scare stories about over population effectively reduced our birthrate at a time when we should have been encouraging big families.
Historically, family size was vastly bigger in the 19th century despite a high mortality rate and tapered off throughout the 20th. The warning signs were there for years.
The quick fix was immigration but now we have enough people to sustain the population. Immigration has to be curtailed now or we face problem that will make the old age issue look like a picnic.
Better management and accountability of services has to occur and a realism about what the state can do while keeping taxation below a damaging level.

Edited by Hrolf The Ganger (13 Jun 2017 1.53pm)

Well that means we need more young immigrants to balance out how many oldies we have got now, doesn't it, so we can achieve stability? The economy will run a lot sounder too with tax receipts up to help pay for the pensions and NHS, etc.

If they black send 'em back?

I'm highlighting the fact that many children born are a direct result of immigration and that is significant because the birthrate would not have sustained the population previously.

so what are you going to do with these children now they are here to solve the problem?

So you would have:
* in the 40s stopped the Windrush,
* in the 50s stopped immigration from the Empire to the UK,
* made the pill illegal for women in the 60s.

Now with the issues we have you now? For example, take a person's assets to keep taxation low?