I think, in the long run, deep economic engagement with China will change it for the better, not economic withdrawal. If you care about the people of China I think this is a positive (albeit, a drop in the bucket).
Not that they should just embrace or accept the worst trends of China -- that wouldn't help. But engage and apply pressure with the resulting leverage. Here's a link to Apple's self-reported efforts in this area (it seems sincere to me, though I don't have any special insight into this): https://www.apple.com/supplier-responsibility/pdf/Apple_SR_2...