Earlier quoted context omitted.
That isn't a proposal to replace capitalism, that is a small detail of a proposal. A single sentence that is a kernel of an idea (and probably a good one), but far from a sufficient argument. Please give an alternative proposal. A link is fine.
> That isn't a proposal to replace capitalism Put down the Marxism for 5 seconds and follow my original premise all the way to it's logical end. - Make the slaves as expensive as the natives. - Why would you need slaves in this scenario? - You wouldn't. - If slaves and natives are equal cost, then machines are given incentives to outperform both. - Western liberalism is completely flipped on its head in a world where…
This phenomenon is a sort of "global labor arbitrage" and it is perhaps right to argue that industry is exploiting this. Also, there are indeed also certain pockets of immigrant labor dominated industry where the conditions for workers have been so bad, "slavery" might be somewhat applicable. But calling migrants universally slaves to capitalism? I can't see that.
Furthermore, at least recently in the United States, not all immigrants are of the "cheap" variety. (http://www.forbes.com/sites/karstenstrauss/2017/01/20/the-to...)
And, even if you want to fix this global labor arbitrage, figuring out how will be hard (at least, to do it without making the problem worse). Historically, government enforced attempts at egalitarian economies have worked out rather poorly.