Yoda, just because the lives of the people are being improved by doing slave labor, that doesn't mean that offering that labor is not exploitative. Of course working is better than not working at all, which is why people take these jobs, but that doesn't mean that offering them is not wrong. What matters is what people are worth, not necessarily what they are paid. Do you honestly believe that paying someone in China or India a fraction of what we do here for exactly the same work is fair, right, just, or moral? People take these jobs because they have nothing else. The working conditions are appalling. They don't have the same labor laws, child welfare protections, and other safety guarantees in other countries, but that doesn't make the lack of any of these right. If you pay someone a dollar an hour, and they accept it, does that automatically mean in your mind that this is not exploitation? Because they are marginally better off for doing this work, does that make what they are doing okay? Under your logic, it appears that the answer would be yes, but I think any moral person would have to say no. Even under your logic, it isn't as if these jobs are allowing people to thrive in their countries. They are still barely able to get by, and they work very hard. How is that fair? The worth of a person is not necessarily measured by how much they are paid, and the existence of these jobs does not make the wages they pay fair, just, or moral.
I would specifically note the word "special" here. You can make a good case that none of us--you, me, and this hypothetical employer--do as much for others as we ought to. That's certainly true. But that's a condemnation of pretty much all of humanity which, generous as it is, never gives as much as it can. It's the singling out of the employer that my question is about.
There's a lot more here, including the simple question of pragmatism, and what's going to lift these people out of poverty (spoiler alert: it's not fewer employment opportunities), but I think examining these base assumptions first would probably be most helpful.