It occurs to me that there's been a relatively recent tendency in the media to see prostitutes as victims and johns as exploiters. I don't think most prostitutes see themselves as victims or see their clients as exploiters, but that way of seeing prostitutes and johns is pretty common now outside of sex-work circles, and it's more shameful to be the exploiter than the exploited.
The most successful exploiter is the one who makes others feel that he or she has their best interests at heart.
Like morality, literature needs to be universal. So that the writer must put himself on the side of the majority, of the two billion starving, if he wishes to be able to speak to all and be read by all. Failing that, he is at the service of a privileged class and, like it, an exploiter.