"The average MONTHLY wage in Thailand is approximately US$300. In Isaan, it's about US$150-200 per MONTH (certainly not US$200 per YEAR!). They are not rich, but not that poor, man!
"Don't say that a girl is "sacrificing her life to save her family", because that's not true in most cases. I wrote this earlier in another thread: contrary to what many people think, prostitution is not a job of last resort for Thai women to survive, but it's rather a vocation for those (and mostly are uneducated farm girls) who want non-essential material possessions that they can't otherwise afford. In the poor villages, you don't need more than 3000 baht per month per person to live as a local, but that's when you don't buy non-essential material possessions.
"Before becoming prostitutes, the local girls often worked in regular jobs, as a farm girl, or in a factory, or as an employee in a restaurant, in a small shop, in a 7-Eleven or in a supermarket, for instance. They probably did not earn much more than 6000 or 7000 baht per month before becoming a prostitute, but that's already sufficient for a local to live a decent enough life in this country. But of course, it doesn't allow them to buy often many non-essential items.
"The average Thai prostitute spends a great part of her earnings in non-essential things (she also sends a substantial part of her money to her family -- I would say about 50% in most cases, sometimes lesser than that, but not often more than that, according to the testimony of many working girls -- though, but her family often uses a non-negligible part of this money to buy non-essential items too). For instance, the average local prostitute would buy a new cellular phone every three months or so only because she can afford it and to show it to her "friends". The local prostitutes also gamble a lot and are often meth-amphetamines ("ya ba") consumers, again, because they can afford it, but those are certainly not essential needs.
"By the way, you seem to believe that a local prostitute earns on average about 25000 baht per month (if 80% of her monthly income is about 20000 baht). That's usually a lot more than that (unless she's old and unattractive), especially for the girls working in the farang-orientated P4P market, even if the girl doesn't have any sponsor. Even if the girl is a freelancer who works just 20 days per month and who only has one ST and one LT session per day, in Pattaya, she would already easily earn 30000 baht per month (and she can do much better than that) and about 50000 baht per month in Bangkok. That's for freelancers, working not too much and asking reasonable fees (and with no sponsor), so, imagine what the best go-go girls are earning in Bangkok!"