Some of my real life experiences:
* Government worker in Lampang with bachelor degree, 20 years experience: under 15K per month.
* Government officer in Chiang Mai with 20 years experience, bachelor degree and some responsibilities, around 45K per month
* Person working from home as a translator for oversea clients, around 150K per month
* Owner of tourist van company in Northern Thailand, around 300-400K per month during Thaksin, and much lower now based on the rant I heard a few years ago.
* Random girl with 5 foreign "boyfriends", around 100K per month plus benefits and occasional side jobs.