There have been many rumors going on for awhile that Foxconn, who makes the electronic parts for Apple such as the iPad, is using as much of the employees as they possibly can. Their have been reports that Foxconn is treated like a military branch instead of the company it says it is, there have also been some employees that have committed suicide because of the stress that they're put through. Foxconn has even had to put nets outside their building to keep employees from jumping. Apple is checking up on those hazardous places working with companies in China to have at least two of those places in China checked.
http://www.usatoday.com/money/companies/management/story/2012-03-18/apple-supplier-audit/53502544/1