Where do you shop? Aldi here has canned beans around 75c (used to be 50c before inflation 2022), but I haven’t seen tuna under $1 in ages!
Subsidies, ability to accept snap/food stamps.
Subsidies from whom?
If you mean from the government I say that no farmers have any right to pick my pocket and take away the money I use to feed my own family in order to support a farming model that can't support itself.