A generation ago, people retired in their 50s and opened up jobs to the next generation, then died 10 years later and left family money to the next generation that could be used for housing.
I don't have a single friend in my peer group who can afford housing, let alone has the income to raise children, if they don't have family money. Upward mobility into the well paying jobs is non existent, with 20 years of people in between them and executive level careers.
People aren't going to stop having kids. It's too engrained in our society and genes. But with automation and an increasingly elderly workforce, job prospects are bad now and will continue to get worse for kids born in the last 10 years.
Ah, ha! The top 1% are already on it.. they're pumping fortunes into defeating mortality as we speak.
For those of us who can't afford it, I'm sure they'll be happy to extend our lives in return for some kind of "temporary" employment unto them, at least until we've repaid our debt...
/s
It also seems that government that invest in children tend to have future generations of better educated, better adjusted, and better contributing members of society, which I feel is worth at least some investment.