Why are we all ignoring the most obvious solution?
As several have posted, the problem isn’t really “Not enough children”, it’s “Not enough children to support the increasing percentage of old people.”
We already know literally hundreds of ways to get rid of people, yes? And I’m sure we could invent plenty more if we turn our best people to work on it.
How about making getting your monthly SS payment into a bit of roulette? You stick your hand into a box. Some 90+% of the time, it plays a cheery note and dumps a load of money into your hand. The other 5 or whatever percent of the time you get a little injection that causes a nice, painless instant death.
So each month, the ‘burden’ of caring for the oldies drops by 5%, and hey! many of those oldies have houses/bank accounts/stocks/other assets that can be forfeited into the SS fund to help with the payout to the rest. Nice bonus, yes?
And the plan can be super0sized. You can say it’s pure chance who gets the shot, but why not bias it toward preferentially offing the oldies who require the most expensive medical care? Could cut way down on the need for more and more hospital and senior care facilities. More money to save/divert to the SS and Medicare funds. ckearly.
It’ll also offer a great incentive for those basically healthy oldies who qualify for retirement but who could perfectly well keep working. Well, keep working! If you don’t stick your lazy, greedy hand into the box for your money this month, no chance of a shot for you, right?
Oooh! Another thought: you might be worried about the oldies who keep working failing to clear the way for younger workers to rise up the ranks. No problem! Just force the oldies to shift to working in child care! With all these new nannies and babysitters and after school tutors, the parents will be provided with thousands of hours of freed up time! So much, they might even be inspired to crank out another kid or two.
Heck, the future is so bright, I need some welding strength vision goggles. 