Well perhaps that's the problem of the market. That it can't particularly function to enrich some people without gross levels of exploitation.
[1]https://www.ebooksread.com/authors-eng/andrew-carnegie/trium...
"Exploitation" is a relative term, some people would rather be exploited in the countryside of a first-world nation rather than the countryside of their homeland.
The Australian national minimum wage is $19.84/hr.
Getting paid about a quarter of minimum wage is very clearly exploitation. There may be other benefits for actually working in Australia, but that's not really relevant here when you're trying to attract native Australians to work for you.
It’s all relative.