IMO, 2.9 to 1 in 2050 is not too bad, that is also accounting for a significant chunk of old people dying by then, too though.
It is indeed hit and miss but one thing that is being factored in is that people are incrementally seeing their age of retirement increasing.
With the FT, is it factoring the UK without being a member of the EU though only as that is where I can see a lot of the LF (that would pay for the retirement fund(s)) dissipating into nothing. This is where I can see a major headache coming up and if the UK does indeed leave the EU within a year or two, I can see the population plummeting.
This is where I can see everything going wrong as per population actuaries.
For example, Japan has a plummeting population and they only allow 50 000 people to migrate into the country every year but people who are elderly there are dying off at a pretty steep rate now. Even though their medical technology is the greatest in the world and advances at the greatest rate those elder generations are going to die some point and as that happens the numbers at which they habit the land are going to fall off a cliff.
Btw I was wondering if it was 1956 or 1957 only 1957 is apparently meant to be the happiest year on record:
http://www.dailymail.co.uk/news/arti...year-ever.html
Though that would likely be for people living then, not born then.
https://www.thetimes.co.uk/article/w...year-ctx8whpgw
Happy times!