So you're suggesting all foreign whores should be expelled from the UK unless they pay protection money to the police?
No I'm not, my point is in Thailand the government are very strict, example being a farang who owns a bar, if he has no work visa, he can't be seen working in the bar, or he could end up deported, if it is a job a local can do, then they don't want foreigner taking the job. The only exception is in organised crime, which the Thai police are one of the largest gangs.