Hey, I resemble that remark!!
Seriously, though, this sort of thing isn't a bad idea. Most backpackers are pretty well set up for the more common emergencies -- we can sleep, prepare meals, and generally get by for a while without electricity or heat. (Around here, ice storms are fairly common, and we can be without power for a couple of days to a week or more. In winter.) The only thing we really need to add is some food and water. Cases of bottled water are cheap -- I add a case a month to my cart at Costco, and cycle it through, with 5-6 cases in the garage at any one time. The pantry has sone hiking food in it, but it's not organized, and the amount varies. I may buy this Costco bucket just to have on hand.
Oh, and 500 calories a day is plenty for *survival* mode, at home, doing limited work.