Chinese factory conditions may not be the exact cup of tea for a San Francisco graphic designer or a Connecticut non-profit ecologist grant writer "¦ but they're, by definition, better than all the other alternatives available to the Chinese workers (or the factories would find it impossible to staff up).
One morning, a rice farmer in southeast Asia might faces a choice. He can continue a life of brutal, back-breaking labor from dawn to dusk for what is essentially subsistence earnings. He can continue to see a large number of his children die young from malnutrition and disease. He can continue a lifestyle so static, so devoid of opportunity for advancement, that it is nearly identical to the life led by his ancestors in the same spot a thousand years ago.
Or, he can go to the local Nike factory, work long hours (but certainly no longer than he worked in the field) for low pay (but certainly more than he was making subsistence farming) and take a shot at changing his life. And you know what, many men (and women) in his position choose the Nike factory.
Update: In an interesting question of incentives, Foxconn, the manufacturer much in the news for a rash of suicides at its plant in China, apparently pays about 10-years salary to the families of workers who kill themselves. They have ended the practice, worried that they are incentivizing some of the suicides.