There is no sign that we're dealing the problem properly or the society and political environment is prepared for that. Similar to climate change, it might be a solvable problem but (relatively) very little effort has been made collectively.

- Older people help each other: it's obvious, but the oldest demographic is not going to be significant healthier than what we see now without a lot of medical breakthroughs. The number of new dementia cases in the US are expected to be one million in 2060 [0]. Ironically, the only way to make "older people taking care of older people" even remotely sustainable is automation of most of the caretaking, so I never get the AI doomsayer.

- Immigration: the decline of birthrate is a global phenomenon. Which means if immigration is the solution, instead of a diversified cohort, most of the newcomers will be from few countries where population grows because other countries need influx of immigration as well. In no world it won't cause alt-right rise. What we call alt-right now will look center-left the next decade.

- Future technology and lifestyle change: yes it solves everything including climate change. It's basically handwaving and saying fusion will come tomorrow so we don't need to worry about replacing petro with fission, solar and wind.

[0]: https://www.nih.gov/news-events/nih-research-matters/risk-fu...