Agree that it's easy to become attached to a working girl (or any girl who is well practiced is giving "affection"). It's also true that the working girl may very well develop feelings for you (which I think takes some of the "scam" out of any "scam"... which I must admit I've rarely seen).
However, any feelings, no matter how strong are not likely to overcome her loyalty to her family (which is a strange concept for most westerners to accept). I haven't taken any surveys (and obviously don't know girls who work in the falang sector) but I'd say you'll find an extremely large # of girls paying off personal and family debts.