"However, I refuse to work in a corrupt and incompetant private education industry."
"I have trouble seeing myself ever leaving this job, it may come to pass that I grow tired of Korea some day."
"My remark about 'a corrupt and incompetent private education industry' was directed towards Asia in general but *Korea* in particular."
The education system in Korea is corrupt and you refuse to work there, but also can not see yourself ever leaving Korea? Maybe I am missing something here, are you making a distinction between private and public schools in Korea? What does that have to do with teaching in Thailand? Where exactly do you REFUSE to work? You seem to have a fixation about your pay, why then are you so judgmental against other people (school owners) who are interested in making profits? In econ 101 class we teach people usually go into business, whether in the educational industry or others, to make a profit and the way to make a profit is to provide a service or product people are willing to pay for. Why is that corrupt?
"I will not be an English clown making a businessman rich by catering to the whims of unreasonable parents who have no idea how to teach EFL in Korea, so why would I do it in Thailand?"
I don't understand. Have you thought about teaching in North Korea or Cuba?
Business people in Thailand, Korea, the UK, The USA, or Nigeria all are interested in making a profit. Nothing at all wrong with this.
Is your purpose posting here to try to discredit the free-market economic systems of the world or is it to find out information about teaching in Thailand?
"If Thailand's private education sector (for-proffit, private academies - not regular schools) is significantly different it would be nice to hear about it, but from stories I've heard it sounds as bad or worse than Korea's."
How is it so "bad"
Government schools in Thailand are mostly restricted by law on how much wages they can pay a foreign teacher. In general, private schools pay more, have better facilities and are less corrupt due to having the profit motive which is absent in the public school system. A corrupt school gains a bad reputation which hurts profits.
Public or private, both have advantages and disadvantages.
I strongly recommend you stay in your top dollar perfect environment in your pristine public school in Korea and not come to Thailand and become contaminated by individuals from all walks of life since the entrepreneurial attitude is common here. Normally overly judgmental people do not prosper in Thailand, I am surprised that they do so well in Korea.