Yes? Why does the US have to fight in the global economy with one armed tied behind our back? And how are trade policy and China's human rights abuses in any way related?
Isolationism, and the concept of 'us vs. them' at a global level needs to die. Humans are a global species, and the longer it takes us to realize that the worse off we will be at trying to solve global problems, like economics.
Also, if that happens, you have the worst of all possible worlds : the situation gets worse (more resources are more inequal), AND the party that tried to get it fixed is the one that loses the most resources. This, of course, will make any future attempt to fix inequality that much harder.
It's just not that simple.