Unfortunately it's a different ballgame with warehouse work like at AMZ. There is no customer facing service aspect, and very little quality difference between employees. What quality concerns there are can probably be traced back to an individual employee very easily; returns due to poor packaging or wrong item can easily be pinned on the culprit.

It's unfortunate, but not all manual/hard jobs are valued equally and often because they are simply not of equal value. Item pickers are going to eventually go the way of cotton pickers in developed countries. One of my best friends works for a startup developing AI controlled robotic pickers. There is a ways to go and it'll start with human augmented AI's but eventually AI's will be picking, sorting, and packing everything.