Why would parents subject their children to such a thing? Because it was less expensive than liquid milk, and had a long shelf-life. Those were the sorts of things we had to pay attention to in a place where almost all food stuffs were imported, and the import schedule was erratic. At the time, I thought the manufacturers of the stuff (Nestle, I think) were sadists. Now, in light of the (probably) impending zombie apocalypse, I think they might be geniuses.
For all the changes in the world and Alaska during my lifetime, we still can't grow much food here. Sure, there are animals and delicious fish, but the growing season is short and cool. We can grow 100 pound cabbages, but grains are tricky, and don't get me started on fruit. Also, some of those animals kill people on occasion.
So, in the event of the end of the world, what would we have? I'm presuming here that the final curtain call will be preceded by a period of energy scarcity on such a scale that manufacturing ceases, etc. etc. We'd have massive Brassicacaeae, moose steaks (here's a how-to if you want to make your own), salmon, and tart berries. I sense scurvy in my future, unless a couple of Jamba Juices survive and start delivering. Which would be awesome btw, a perky little badass Jamba juicer hellbent on delivery in a Mad Max world. Quick - somebody go write that.
So, for all you authors of apocalyptic and post-apocalyptic prose, where's the food coming from? Are all your characters hoarding Twinkies and raiding the 7-11 at the end of the world, or are they growing and harvesting? And what are you planning to live on, should the end times come a-callin'?