Your fallacy here is to assume that the per-capita income growth is affecting the same people as the increased job competition. 2x the people might mean 2x the

Your fallacy here is to assume that the per-capita income growth is affecting the same people as the increased job competition. 2x the people might mean 2x the revenue for Amazon, but there is no guarantee that it'll trickle down. Maybe Amazon can, due to automation, satisfy the 2x in demand with only 1.9x in manual labor. In that case, work supply and consumption both grow by 2x. But salaries for the workes will go down while salaries for Amazon management go up. So the total salary average might remain the same, but it'll increase inequality nonetheless.