Well yes, that certainly is possible, another Freeper alluded to the same thing. There's a vast difference (not in the crime itself but the magnitude and acceptance of the crime) in that we are not noted for being the destination for "sex vacations" as Southeast Asia is.
In this country, we actively root out and prosecute these people but then you always hear the apologists for decriminalizing the commercial sex trade. Could we do more, do better? I think so but ask yourself: If I had knowledge about this sort of thing going on, would I report it?
After being in law enforcement for 31 years, we would find out that there were folks that knew all along about the crimes being committed (that we were desperately working on) but not take the first step, even anonymously, in reporting them. It's not just law enforcement that has the duty to act, we do as well as citizens--am I making sense here?
What you say is partly true, although I report every criminal act I see.
The judges in our town don't take prostitution seriously. They do not understand how it corrupts the whole area and is tied to drug dealing.