Thailand is most of the times a make belive land...The parents and siblings, may know what the eldest daugther do for a living, but choose to ignore it, since the cash they provide for their family, brings in face in their community.
Either way, i have talked to alot of BG's some say they like the work others dont....but in the end, they need the cash, and with only 4 to 6 years in school, its either the farm or some factory work, which does not pay for their living, and the things they want for themselves and the family.
So respect to them....
If i would like my daugther to go with a man for money ?...well its hard to answer, first i would say NO WAY...but i have never been poor, i have always had a good roof over my head, i have good parents, a good education, and money is not an option for me. But some of these girls come from a background so much more different than our western idealized society, that we will never fully understand their motivations to do what they do.