"American workers are getting cheaper". This implies a change in wages.
And with that, there is no need to bring in relativity. You said US wages are going down, plain as that.
I know your beliefs on income disparity in the US. I think you wrote what you wrote with those beliefs in mind, even if only subconsciously.
If you'd just simply acknowledge someone's point once in awhile instead of trashing it, things wouldn't have to get this silly.