Very, very, very few people are so far off the grid, they have no need for money of any kind at all and pretty much everyone has things on their "wish list" that are outside of their budget.
I know a few people, who spend very little money (for example €10 EUR per month), but I do not know no one, who would not spend no money at all. Of course there could still be people, who live without having and spending money, but I do not know none of them.
Yep, I have never met any. One "self-sufficient commune" in Finland was happily telling people how they live without work by providing for themselves - and taking government payments...