Something being legal does not make it right or just.
For example the piss bottles. It is a thing for truckers and delivery workers to piss in bottles. UPS people, FedEx people, Truckers more than the others will talk about it anonymously. But everyone acts like Amazon isn't acting within the unspoken norms of society.
If you want to change the justice system, go ahead. But there's a difference between changing labour laws and going after one specific company.