Thankfully, Foxconn, the plant in Shenzhen where Apple's iPhones are manufactured, has taken some proactive and preventative steps following 11 employee suicides ONSITE in 2010. The first, and harshest, is shown below - yes that's yellow netting to catch jumpers because employees were jumping out of the plant windows...
The other proactive measures include a 50% salary increase and a large full time staff of counselors. Apple isn't their only high-profile client - the others are IBM, Microsoft, and Cisco. Think they're trying really hard to retain business??