Lots of relatively rich countries are in the TPP, including my country, NZ. It has significant rules protecting labour and environmental conditions. It's fine.
From your link:
> The surplus with Mexico turned into a chronic deficit. And the economic dislocation in Mexico increased the the flow of undocumented workers into the United States.
So they're saying that jobs moving from the USA to Mexico increased the flow of Mexican workers to the USA? That makes no sense at all.