Why do you think it is okay to have an uneven allocation of money in a society so that those on the top can do with those on the bottom as they want?
Of course I don't think that's okay, don't put words in my mouth.
My contention is that sex is morally equivalent to any other form of labor, and I believe that the pedestal we put sex on as a society is a manifestation of patriarchy. It's no coincidence that for most of human history, sex work has been one of the few labor markets where women have an advantage over men, and thus controlling sex work has been one of the major tools at the patriarchy's disposal for controlling women's bodies. The impulse to control sex work is the same as the impulse to force them to wear specific clothing, the only difference is that in Western societies one of those forms of control has had a massive philosophical edifice built around it and the other hasn't.
I read the article and my main contention is that it doesn't establish why we must treat the performance of sex as morally different to any other form of service work. As I said in the other comment I believe that the way we are compelled to treat sex as "different" is a manifestation of patriarchal thinking - there is nothing fundamentally different between a woman who is coerced by poverty into prostitution and a man who is coerced by poverty into agricultural work, and the ways to solve the exploitation in both cases is the same: organization of the workers against the bosses, the abolition of bosses altogether and shifting control of that industry to the workers in it, and ultimately the abolition of the capitalist mode of production that incentivizes maximum exploitation of all who participate in it.