Can you cite this? Or is this just drivel?
http://www.businessinsider.com/brutal-conditions-in-amazons-...
http://www.salon.com/2014/02/23/worse_than_wal_mart_amazons_...
http://www.huffingtonpost.com/2014/05/07/amazon-warehouse-wo...
http://recode.net/2014/06/30/amazon-was-a-prison-says-former...
http://www.businessinsider.com/brutal-conditions-in-amazons-...
http://bits.blogs.nytimes.com/2013/12/16/amazon-strikers-tak...
Are the two cases that come to mind. (First link may not be Amazon, but appears to be representative of conditions in warehouses for the pickers and it links to plenty of other sources that ARE amazon)