Incidentally, many of the complaints against Chinese/Bangladesh/etc. factories could also be leveled against US factories per my experience. Other than the child labor bit, I've seen just about everything here, too, though I expect some of the problems are simply more widespread and occur more frequently.
Factory managers know that their employees don't have a lot of options and tend to squeeze them hard. (Then collect bonuses for cost savings...) It was always amusing to hear them tell the crew how great it was that labor expenses were down. And yes, I did point out afterwards to the people that "labor expenses" === "your paychecks." For whatever reason, this was not obvious to some.