Well you can't scale a business if you rely on only yourself as the workforce, so you will at some point have to outsource work to other people. It doesn't matter where those people are located. It's certainly unkind to overwork or underpay people, no matter where they are in the world (which must be looked at relative to local salaries). But that's not at all what the book recommended.
We all profit off other people's work, and are profited off of. I personally don't find this inherently problematic, since it's not a zero sum game.
To reiterate my point: I think it's not per se unkind to profit off other people's work. It's all about _how_ it's done.
