I read that first link when you posted it earlier. The second is a propaganda piece so I didn't watch the video, but I have read a few articles about the conditions in some of the factories in China. Conditions there may be deplorable by western standards, but remember that the factories in the west were similarly bad at the same stage of economic development. That doesn't make it acceptable to us now, but it is a transition stage that must occur before things like OSHA can be put into place. Ultimately, it will take the people themselves demanding safer work environments for developing countries to catch up to western standards. We can only help persuade them.
By the way, the Foxcon issue is one of the many reasons I don't buy Apple products. But there's a difference between exposing workers to dangerous chemicals and safety hazards without informing them vs. just low pay (by your standard). The first is immoral, but the second isn't as long as the employer does not monopolize the job pool or use coercive tactics to prevent employees from moving up into a higher payed talent pool. As far as I can tell, Amazon is not doing either of those, thus my decision not to boycott them. Of course, I'm always looking for new information and will revise that if I see something that is truly a violation of labor laws or human rights (and how they handle the situation when one of those stories shows up).