The megacorp can provide cheap food, it just doesn't want to. In practice they adjust the margins in a data-driven way on individual goods.
UK supermarkets actually provide pretty cheap fresh produce, because the market is pretty competitive. I think the most ridiculous I've seen was a 1kg bag of carrots for 20p.
Many countries or locations do not have highly competitive supermarkets.
Oh, and there's both volume and self-discrimination effects at work. In my supermarket shopping in the Asian food section is often cheaper as they sell big bags of rice and spices, to more cost-conscious consumers. See also: Costco.
UK supermarkets actually provide pretty cheap fresh produce, because the market is pretty competitive. I think the most ridiculous I've seen was a 1kg bag of carrots for 20p.
Many countries or locations do not have highly competitive supermarkets.
Oh, and there's both volume and self-discrimination effects at work. In my supermarket shopping in the Asian food section is often cheaper as they sell big bags of rice and spices, to more cost-conscious consumers. See also: Costco.