The bottom billion are mostly self-sufficient farmers or hunter-gatherers. Money is only relevant in an interconnected modern economy. A small tribe of hunter-gatherers or a small farming village has a GDP of 0, but they have the basics covered.
Even the bottom billion are probably a lot more incorporated into the state than you would expect.
Their lifestyle encompasses what seems to be romanticized by primitivist anarcho-communists and other radical leftists. If the only thing missing in this picture is "hospitals", then it has nothing to do with their wages.
The crowd that bemoans consumerism and proselytizes that we "don't need" x/y/z also thinks that these independent farmers, who mostly don't participate in global trade (the poorest, I mean), need more money. Not to be conflated with what UN defines as "extreme poverty" which entails inability to provision food effectively. And the way they want to give them money, is through the benevolent progressive imperialism of Communist takeover.
Those people know about the outside world, send their kids to school and are aware that they can't afford to go to the doctor.