It is very interesting to read all the gossip and drama surrounding the new visa rules. I think 'apparently' is the correct word to use during this debate because I think people need to look at this situation realistically.
I know many "teachers" work here on tourist visas or Non B visas without a work permit etc. I think that is a given. I think it is also fair to say that no "qualified" teacher, and I mean one who has just spent 4 years of hard graft in university, is going to pick Thailand as their preferred teaching destination and work essentially for peanuts. Those at international schools obviously yes. They pay a proper salary in line with their qualifications.
I think the clampdown may continue for a few months or until they realize that Thailand's school English programs are falling apart. Then, I suspect things will return to normal. My personal opinion goes back to the 'degree no degree' debate which always kicks up a stink and ruffles a few feathers.
I do have to stick by what I say though and feel that if Thailand took a more sensible approach to foreign teachers then a lot of this could be avoided. Competence is needed more than a degree. A competency test compiled by a reputable outside agency should be used and if a foreigner can pass that and has a Tefl certificatel or the like, they should be accepted to teach.
There are many people in this country who can do a decent job and are happy to do that for the low wage offered. The wage offered is usually all the schools can afford. It will be a sad day, the day Thai authorities decide they don't need English. The world runs on it at most levels. We will have to wait and see what happens, although not famous for it, I am sure common sense will prevail and maybe if there are sectors that need clamping down on, they concentrate on those rather than sectors that are actually giving something to Thailand for relatively little reward.