Why exactly do you believe that a government default will prevent food producers from making food?
Seriously, I have no idea what you're on about.
Who said that a government default would directly prevent food producers from making food?
Sure, the dollar will tank. But it doesn't matter how much BTC skyrockets or how much it is "worth" against another currency if there aren't any goods around to buy with it. You could price BTC with rice or gas but if there is no rice or gas such a measure is meaningless.
Why will there suddenly be no rice or gas etc... to buy? Hyperinflation you might argue would make people SPEND all their money consuming all the rice/food/etc... on shelves, but after the cat's out of the bag anybody with a brain wouldn't accept a rapidly inflating currency, and would sell his goods (which by all means he can continue to make, paying his workers in the inflating currency if possible) for a stable currency.
That is a ridiculous assertion and an offensive oversimplication. Is that how they teach people to think these days?
Google "economic collapse" "stock market collapse" "hyperinflation" "hyperdeflation" "government default" and learn about the myriad secondary, tertiary, etc effects caused by various significant government and economic catastrophes. This isn't kindergarten. I expect people to have at the very least a highschool- or college-level understanding of economics.
(Also, lol @ the insane level of condescension I managed to pull off in this post.)
(Also note how I humorously imply that one can become educated via google searches of certain keywords)
(Also, lol @ the fact that you entirely ignore my point by throwing around as much terminology as you can lay your hands on)