As I recall, Costco periodically has five gallon buckets of survival rations for sale, for about $90. I think it was good for 90 days or something like that. I looked closely at the labels - most of the stuff takes a lot of water and cooking to reconstitute, and it didn't sound all that appetizing anyway. And yes, it was made in Utah. I traveled there for about a decade on business related stuff, and got to know some of the people there. I'm told that there is a vast bomb shelter under the center of town at the Temple, big enough to hold all the faithful. And of course well stocked with provisions. I don't know if the Mormons believe in "Rapture" but is sounds similar.
My own take is that since these survival rations have a shelf life, it would probably be better to buy canned, dried, and otherwise stable foods that have a relatively long shelf life that one would normally consume - and then rotate the stock as you consume them so that there is always a reasonable supply for emergencies and it's food you actually can eat. I keep beans, rice, canned foods in stock, as well as a few five gallon bottles of water. Gotta do that in earthquake country. Also bought a small 2 stroke 800 watt generator ($80 at Harbor Freight) which is just enough to power the chest freezer. It's 110 only, so it couldn't power the well pump, but the well water isn't potable anyway, I just use it for irrigation.
Back when we had the big quake in '89, one of the first things I did was take my car and truck to the local gas station to fill up. There wasn't any line, but I felt that if things got bad at least I'd be able to get away. As it turned out, there was no need - people really teamed together and I don't recall any instances of looting or rioting.