Wages are too low
Both parents need to work just to survive
Homes are too expensive
Food is too expensive
Clothing is too expensive
Post-secondary education has become a scam
One serious sickness and - in America, at least - you are bankrupt for decades
The list goes on and on.
The number of childless couples will go up as the need for children decreases - this is obvious from places like Norway and Finland - but a focus on strong nuclear families with little to no financial stresses arising out of having children will encourage most who do want them to actually try to have them.
So that leaves us with some populations dropping by 90% in a matter of decades (which is wild to think about). And the associated problems of top heavy economies. (More old retired people needing medical care than there are young people to support them)
And that brings us to wildly off remark #2 “If, thanks to artificial intelligence and robotics, a lot of jobs can be done by computers and robots, and that generates a lot of economic growth and that helps us to pay for Social Security, that will make the transition much easier.”
Ok. Consider the top 7 companies in AI. Lest start with Amazon. (Because that’s where 90% of people host their compute, so they might just use bedrock) what does Amazon pay in corporate income tax? Zero. Well that’s not going to fund anything. Ok let’s do Google. They’re pretty big in ai. Both founders are moving out of state rather than pay the modest billionaire tax. Ok that one is out too.
Ok what about that dude making the mecha Hitler thing. Humm he’s taken more government money across his companies than they’ve paid in taxes. (Or said another way his activities are a net negative for government revenue)
Just sayin, that plan ain’t gunna work (ai paying for the top heavy demographic shift) I don’t know what’s going to happen but the rosy predictions are impossible so that only leaves less optimistic options.
Will there be more than the number of old retired people who are able to still move and are willing to support their peers though?
I live in rural area with a median age of 60 and the bulk of the support required for those over 60 that need assistance comes from those who are over 60 and don't mind helping others - my own father recently passed 90, has stopped driving and delivering meals on wheels to others younger than him with poorer health.