Some of these women regard themselves as "Sex Professionals" .
Are you perhaps labouring under the impression that all prozzers in Poland pay taxes on the full amount earned?
In Poland it is normal ( and not that unsual in the UK either ) that a given business is registered as a go-go club, strip club or a massage parlour and the taxes are paid only on what is officially kept in the books - more often than not minimum wage payed out to girls.
All the rest is the pot that is divided between girls and the pimps in some form.
Why is it morally accepted in a Catholic country? Why is it morally accepted in a Jewish country? Why is it morally accepted in a Muslim country? Why is it morally accepted in a protestant country? Because as long as you have some clients, you have an industry.
What a lot of Poles fail to understand is that many Catholics, especially from the US, are really pious and moral people that will actively implement the tenaments of their religion into their life, political choices and etc.
In Poland, as I mentioned, most people are "token" Catholics - they go to church on a Sunday and to confession once every blue moon, involve a priest in such rites as a wedding, baptism, etc. But the involvement of religion in their life doesn't go any deeper and the idea that some other Catholic might find Poland's prostitution laws ( legal ) and huge underground abortion circuit ( illegal, half the gynos do it ) preposterous doesn't even enter their heads.
Polish catholics who do find the above to be in conflict with their faith are branded as "Mohery" and nobody listens to them