Your consent argument makes
no sense to me. We're probably too far apart to communicate, but I'll make an attempt:
I agree that "informed consent has to be voluntary or it's not consent".
But this is absurd: "If 72 hour weeks are standard and your choice is long hours or being unemployed, it's not informed consent."
Note that you can replace "72 hour weeks" with "40 hour weeks" or "10 hour work weeks" without changing the argument. I'm guessing your silent assumption is that anything worse than your current middle class American expectations are by definition inhumane. This implies that poor people across the world can't consent to anything.
To me, as long as you can freely walk away from something, you are there by consent. No other definition makes logical sense.