I suspect that the point Napp was making has been missed in the societal context and that tmr19 while solid on the textbook basis has not considered the multitude of factors that go into selecting a job in the real world.
Granted I also think that people hate on Amazon too much. It’s loss leading is not as blatant or severe as other firms and its business model more sustainable, it really is better in many cases than the high street competition (unimaginative local councils and Treasury policy is also to blame) and also its warehouse workers are actually quite well paid and not treated as ruthlessly as when they first arrived.