Unfortunately, these conditions seem to be the norm in China, regardless of the company or factory. Even if Apple took the nuclear option and dropped Foxconn as a manufacturer, would any rival companies (that had similar manufacturing capacity) treat their workers any better?
I do not think it is accurate. Apple is more of a low volume, high margin kind of business. Mind you, the high margin is for themselves. If at all, I guess the manufacturer may sell to Apple just above cost, just for the sake of the free publicity.
But if you look at the bottom line, I doubt Apple is a Foxconn's make or break client.