Edit: Looking at http://www.wellness.com/news/6427/us-workplace-suicides-jump... , it looks like in the US workplace suicides are less than 1% of overall suicides. Doubtless different in China, but hopefully makes the point that comparing the two statistics is likely to be problematic.
Even if they're all going home and committing suicide there, the only evidence I've seen put forward for the supposed wave of suicides is the workplace ones. The stats there don't back up the claims.
People aren't joining Foxconn from jobs where they've got 40 hours a week and vacation time. They're often joining from rural areas with subsistence farming, poverty, shittier jobs, etc. International attention on Apple and Foxconn likely prevent at least some abuses that are rampant elsewhere in China.
All that said, there's no reason we in places like the US can't pay $20 more for an iPhone.
Also, we are talking about statistics posted in China. Are you fucking kidding me?