Just to expand on that - while it may be down to an individual wanting personal gain, I think there are very possibly other bodies involved, like the government of SA, that are really pushing the agenda. I can easily imagine them, years ago, saying, look, if you toe the line on this, we will make sure you and your family are taken care of, even if the rules decide against you. If you don't, it will be back to the village for the lot of you.
That's an impossible situation for an individual from a vulnerable background.
I'd not even put it past them to have known what the likely cause of Caster's situation was before it was officially investigated or she was told herself.
I can't know of course, but since I can't, I won't judge individuals, it is up to the rule-makers to nip this stuff in the bud and make sure that kind of exploitation can't happen.
It's not like the eastern European ladies really had a choice either, they were told what they were to do and there would have been consequences to refusing.