They run by lots of little people each working their small part of the picture. This creates a machine that will grind up people and spit them out in ways the little people would never themselves agree to do. If you get the attention of someone who can temporarily halt the entire process you can get humane treatment (such as people who post complaints here or on twitter that gets far more done than any amount of going through customer service), but most people don't have that luxury.

How far will this system support totally amoral actions? One just has to consider cases such as Nestle and their baby formula to see it will allow immoral actions up to and including causing the death of children.