Old people need much more than very old food. What about electricity, water or heat in the winter for example? Can they store that for so long?
How does the coming crash, when all the old people retire and I quote " All investments and savings will disapear and there will be plenty of old starving people dying like flies and begging foreigners to come and take over". How does this crash make the nuke plants, water treatment plants, natural gas pipelines and all the other infrastructure suddenly evaporate?