The way primitive tribes are living in poverty is the way human kind have been living for hundreds of thousands of years. If some kids have swollen bellies is not because you have a rich diet to make your belly muscles. If a considerable part of human kind is still left behind is due to being geographically located far from the heart of recent un-natural developments.
Let’s don’t forget that poverty is ugly, but natural. It’s not, unlike wealth, a product of civilization. Humans are born naked and poor, like other species. All other animals are poor by our very recent norms and standards. The extreme contrast is what civilization caused and made it visible by comparison. Not to justify the poverty, let’s just remember this to be able to reduce and eliminate poverty for our species.