Good points. Consumption of older people is weighted toward services more than perishable goods like tomatoes, though. So there's a related #4 mitigation option: technological improvements allow older people to be more self-sufficient. One current change in progress is self driving car services like Waymo. My uncle drove my grandmother around for the last 10 years of her life because she wasn't fit to drive anymore. I hope that no human will need to drive me around by the time I can't safely drive myself.