I know what you mean, you are right, but that guy is probably paying max he can and they found an arrangement. She's also probably not 1000% dependent on the money so she could also refuse and take a different gig or negotiate.
As I said, I'm totally with you, the work should get paid what it's worth and people should not be cheap about it, I'm just saying consider taking in more contextual information before you call out those enslaving junky exploiting fellas.
I was recently intrigued to learn that only half of the respondents to a survey said that they used NO disk encryption.
Is the other half alright?