Since cavemen were "pack animals", such lifestyle wasn't a luxury. The technology didn't allow an individual to support himself for a prolonged time. That was more like at war: a machinegunner doesn't trade his fire for a bazooka shot and vice versa. Teamwork instead; so did the cavemen, and their life was like war.
Such a lifestyle was a "luxury" for a caveman who had been isolated or expelled from his community. That aside, it still doesn't undermine my original contention and you are still wrong.
Participation in a group/team hunt (or other endeavour) still falls under my basic three means of satisfying needs. If one participates in the group freely, then it is merely a contract (albeit an unwritten one) in which one contributes their efforts to the group goal in exchange for a share of the profits...or mammoth steaks as the case may be. If one's participation in the group is coerced without any promised or real benefits, that slave will still have to resort to theft, trade or his own use of force to satisfy his needs.