Since engaging in this conversation with you I have learned that Burmese women are being imported to offset the decline in Thai women engaging in sex work. Have you learned anything?
Well I have spent 3 of the last 5 years in Thailand and am heading out there next month. I must have learned some things in that time. You will meet Burmese illegal immigrants in any job that's "unofficial" in Thailand, because they have no work permits. Prostitution is illegal in Thailand so it's "unofficial" work. So it's kind of expected you'd see illegal immigrants working in these types of jobs. There's a correlation between illegal activity and no visa status. No visa, you have to work in these types of jobs. You have a visa, why do you want to work illegally?
Women in a depressed economy are more likely to engage in prostitution.
Even if true - so what? How big a difference is "more likely" when still the vast majority of women do not get involved with it. It's not as great a job as you may imagine, particuarly in countries where it is illegal. Illegal activities normally means exploiting people with low pay and bad conditions because they don't have much choice. If I were a woman in Thailand (with legal status), you're better off working a regular job in Bangkok and taking 10-15K baht a month. At least you have some security and worker rights if you're "official". It's not like the bar girls of Thailand have a trade union and working rights. Illegal status is something else.