I listened to a podcast recently about Amazon union drives and apparently the big gripe isn't wages but working conditions. The almost universal sentiment is that people are treated like robots. Breaks are so rare and short that pissing in bottles or defecating in bags is common. Sometimes people have to choose between relieving themselves and eating since the break is too short for both. Most of the people interviewed wanted more humane working conditions.

There are many worse places to work, but that's whataboutism and using that argument leads to a race to the bottom.