Gassed then burned. Why would you gas them if they are burnt to death already?
I believe tha you are correct!
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They did not have access to metal tools, they didn't build permanent homes because they had to constantly be on the move to find food, they weren't equal. The men were seen as superior to the women. SO that leaves you with the only option of RARELY SHARED FOOD WITH OTHERS. They didn't share food with other tribes because what food they had was barely enough to feed their own tribe.
Economic growth can reduce poverty by doing all of the above. Growth benefits all aspects of society--public and private--and often occurs in areas where there is lots of competition.