Also, categories are complicated. One reason Amazon is the target of discussion here, and not Google for example, is that Amazon operates warehouses, and warehouses hire low wage employees. If Google was running as many warehouses as Amazon, would they pay better? Maybe they would, but how much better? If Google's low wage workers are in factories in East Asia run by third parties we've never heard of, instead of actual employees on their payroll in the US, is that better?