The point is that more than a billion people with extremly simple living conditions compared to the western world could be ready to enter the same labour marked in a few decades. This will create a "buyers marked" for employers and will not be good for employees.

Think like this, if 1 million houses just as good as yours could suddenly fit in your neighbourhood, would yours fall in value?

This will have drastic consequences for all, rich and poor. And might be for the better in the long run. But short term is grim for the normal guy expected to improve his/her living standard.