How many of you would like to work in dormitories at your employer, be called up to start a 12 hour shift within a moment's notice be given nothing but one biscuit and a cup of tea to last you through that shift? Maybe you'll do it for your own startup, but I don't think any of you would do it for an employer.
The reason why Apple manufactures in China is because workers have no rights -- and with that comes unmatched labor flexibility and rock bottom prices too.
It's not US competitiveness that is the issue here -- it's China's lack of human rights.