Nice to see that (1) unions exist in this country (not noticeable in Isaan I think) (2) they are trying to contribute to government policy. Good for them.
Unfortunately, a large part of Thailand's workforce (30%? 50%? 60%? ...) is in the 'informal' part of the economy ie workers who have no officially-recognized employment in a company, no officially-recognized employer, no officially-recognized income, and no due income tax ... They are - as it were, by definition - unable to be helped, at least by the unions.