Your solutions can exist. Whether they should or not is an economic tradeoff problem. Production is not free, storage is not free either. Neither one of us have

Your solutions can exist. Whether they should or not is an economic tradeoff problem. Production is not free, storage is not free either. Neither one of us have been arguing with hard data yet regarding total $ costs, or evaluation of long-term risks, but the tradeoffs do exist. The U.S. grows 13 billion bushels of corn per year (https://en.wikipedia.org/wiki/Corn_production_in_the_United_States https://en.wikipedia.org/wiki/Corn_production_in_the_United_...). Of this, it looks like about 1 billion bushels go to feeding U.S. residents directly. I tried to lookup the volume of corn silos in the U.S. to get a good figure for how many years' worth of consumption we keep lying around, I haven't found anything yet. And this is all looking at a pretty low-level survival grain- canned foods are a bit more expensive to store, then fresh produce, then frozen foods, then fresh meat, etc. (approximately). These foods are also more expensive to produce.