[temujin]

The efficient, egalitarian solution to poverty is improvement of the home countries, not open borders. This is most obvious for China; that country has so many people that if one attempted to "solve Chinese poverty" via brute force importation of their people, the entire First World would have flipped to a Chinese majority. Instead, Chinese poverty is being solved more than an order of magnitude more efficiently and less disruptively--this is a thing that is actually happening, not spherical-cow theorizing--via trade, technology transfer, and related methods.

Open borders may still have merit (I'd certainly value the additional convenience), but your argument for it is obviously wrong.