I think there is a problem with prostitution. It should (obviously) be legal and regulated to be a safe "working environemnt". But the movie does show the real dark side. The girl didn't get into it because "she likes her job" like she said. All the prostitutes lied to him just to make him feel good about himself. In reality they do it because they like money, because of psychological problems or because they are desperate. A few might actually like the job. But most won't.
Honestly I don't know if I could ever vote for someone who uses prostitutes. And I'm an atheist. I don't want to judge normal people, but politicians - who make the rules governing how I may live? Deciding what I can do and what I can not do? Yeah we do need to judge their characters a bit more harshly.