The revolving door
To me the saddest part of the low-TEFL wages in Thailand are the Thai students who end up being taught by a rotating crew of inexperienced, untrained foreigners who will probably only stay in the job for a year or two at the most. But thats the result when the salaries are what they are. So long as that's the case, TEFL in Thailand will be a good option only for fresh graduates seeking a 1-year adventure abroad, or retirees looking to pad their pensions.
Committed, trained career teachers will either end up teaching the elite in an international school, or quickly move on to greener pastures
Danny