This is a very odd argument in the USA context. People showed self determination by emigrating from poverty and lack of economic opportunity in Europe – they didn't stay "…doing the hard work to build viable economies."

Now the US people are denying other people the same opportunities their not-to-distant grandparents had. I guess it's an insiders market.

I find your concept of US "owing" anyone anything strange. Depending on your political opinions you might think that humans "owe" each other equal opportunity.