Many use their bodies as a "small business", having their own personal marketing, credit card processor and online clients, increasing and improving their portfolio.
Because they have such leverage, they end up being strict on what they'd do and even who their client is. In case something goes wrong, they can still go to the police and report the incident.
Which country is that? The Netherlands, Austria and Germany, for example, all have horrible trafficking problems. In Nevada, the women are ostracised and harrassed by the police at the legal brothels. In New Zealand, the police cannot tell the difference between legal prostitution and illegal pimping.
So which country are you in that is doing better than these with legalised prostitution?
Well in Germany the main trafficking problems is Africans. They need to work something and because our rotten legal system prohibits them from working for months after they have arrived, the men end up dealing pot and the women on the streets.
And Romanian/Bulgarians... well, the men work on day-jobs for ultra low pay, often illegal, and the women go on the streets. Everything's better than the conditions where they come from.
Also, https://en.wikipedia.org/wiki/Human_trafficking_in_Germany links to a US Trafficking in Persons Report 2010. Here are some quotes:
"Ninety percent of identified victims of trafficking for commercial sexual exploitation came from Europe, including 28 percent from Germany ..."
"... approximately one third of identified sex trafficking victims reported that they had agreed initially to engage in prostitution."
"Police estimate that gangs brought around 1,000 Chinese people to Germany over the past decade and forced them to work in restaurants under exploitative conditions."
So, just like every other country then?
I can't think of any country that doesn't take prostitution as taboo. Even in Germany and the Netherlands it is...
Wealthy, powerful men with a broad spectrum of choices do not typically choose cleaning the toilets at your office.
See http://www.nswp.org/sites/nswp.org/files/NSWSexIndustryRepor... There are other interesting things including 'Sex workers’ reasons for choosing current workplace' was 'Hours are flexible' and 'the LASH study found no evidence that any of the women had been coerced into working in a brothel'
Street walking prostitutes are generally illegal, and unregistered brothels are illegal.
Check out http://www.scarletalliance.org.au/research/ for more research.
It does seem like it's primarily foreigners who cannot get a job. This seems exploitative. And the article you cite doesn't paint a rosy picture of everything being great with legalised prostitution.
If not, there is a taboo, if not about visiting a brothel, then about talking about it.