A slightly different but related question that hopefully everyone will find interesting, no matter what affect they attach to Amazon warehouse working condition

A slightly different but related question that hopefully everyone will find interesting, no matter what affect they attach to Amazon warehouse working conditions: Food service in particular, I think, is having a lot more difficulty hiring and retaining people than they're used to, even with considerably higher wages and hiring bonuses, but if you believe what you read in the news then it sounds like Amazon warehouses aren't (otherwise you'd think they'd ease up a little on being hardasses). These aren't exactly the same type of job, but they're "pretty similar" in many ways. So, what's the difference?