[OJFord]

Availability of cheap crap is much higher in more developed/high GDP countries I suppose.

In extremis, if you only eat what you can grow, rear, and trade for, then you're not eating breakfast ~cereal~ sugar, ready meals, crisps, etc.

It's a bit tangential, but this is similar to how such a lifestyle isn't even cheaper - it's not the only shopping those people can afford - most of my meals probably cost less, because I take an interest in cooking and eating (i.e. I'm buying vegetables not ready meals) but that doesn't mean there's always (or even that often really, especially amortised over all uses) an out-of-reach expensive ingredient.