The planet is overpopulated and the situation is worsening literally by the hour.
Our technology is causing the end of labour intensive industries, and for that matter cutting down on jobs in industries that have not been traditionally labour intensive.
There is a very real chance that many children being born today will never have a real job in their lifetime, (I’m excluding government financed "make work "projects), and far from paying for older peoples retirement, will actually be in competition for the resources actually available.
And before we start slating people for the unforgivable crime of not dying younger we must remember that while children being born now; might in theory finance o.a.p.s retirement, perhaps… maybe…one day… if they’re lucky …
Todays old people for the most part have already paid out over their working lives, not potentially, not theorectically, not as a future might well do, but actually.
They are NOT a burden on todays young people, the reverse is much more likely.
And if ever theres a desperate need for large amounts of unskilled labour, then as someone said upthread there are literally billions of people wanting to emigrate from the Third World to the First and no sign of their numbers diminishing.
(And this no doubt is why the Third World is the T.W., not just because of institutionalised corruption )
People who on a personal level like having lots of children about the place, tend to pretend that overpopulation doesn’t exist and try to influence the rest of us to believe that its only a paper dragon .
Unfortunately its the rest of us who’ll have to live with the pollution, extinctions, loss of habitats etc., but more importantly the starvation, lack of water, lack of resources, and the wars and famines caused by such.
And for selfish people like myself, I don’t want to have a serious reduction in my quality of life in the not too distant future, just because some people get all squishy over having kids.