Its a good idea...however,
I think Prostitutes needs to be regulated more thoroughly in some countries (particulary my own- the UK), its not exactly a glamorous job, however there needs to be more protection for working girls, steps such as legalising Brothels (we're not going to put a stop to Prostitution overnight) to get the girls of the streets and into a safe place that can be staffed with Security, Doormen and that will be subject to random inspections is a small step in insuring safety of these women
Furthermore, I think several European Countries need to rethink their Slavery Prostitution policies, because too much of it is happening, being sold into Prostitution, disguised as an offer to make a living is downright disgusting, yet its still happening and really several Governments are letting it happen
If the Governments are so worried about expenditure, why not legalise Brothels and then Tax them? At least working girls would be getting a safe environment, better rights and the Governments would then perhaps consider investing resources into preventing illegal Sex Trades