Are sweatshops that BAD?

I"ll admit I'm really naive when it comes to this topic, but I can't understand why we are so supposed to pity all these workers in third world countries who make our clothes. Are they bound by some type of contract that forbids them from leaving their jobs? If so, that sounds like a government problem. I'm assuming there country offers no better opportunities in terms of employment. I would think most people would be grateful for having a large corporation move work overseas into their country. Obviously the low wages are must be not be so insignificant to them if they are working 12 hour or more days. I'm in no way trying to justify this labor, I just wish when the facts are presented in all the left wing documentaries that they would at least compare there lifestyles to those of other people in their country not ours. Sure by our standards their bathrooms are horrible and they have no breaks, but everyone knows we live in a stuck up country and that our view is no where near a good representation other citizens of this world. Anyone reading this, I'd more than appreciate you clearing this up for me and adding any other information.