No one is saying that a native speaker is an automatic qualified teacher. It seems to be only in your head that this state of play exists.
Regardless of where you are from you must have a university degree and a TEFL plus 2 years of teaching experience. Therefore anyone who meets these requirements (based on university location) is deemed qualified. If it was a case of Philidelphia bus drivers turning up and taking jobs off experienced teachers on the basis of where they were from, then your point would be valid.
As has been mentioned, there are standards and these are constantly being raised.
Anyone who is a non native (language) speaker and teaching here can get their work permits renewed, no one is having to leave in the morning.
If you don't meet these requirements then what's the point in coming and carrying on that you should be the exception to the rule. Find somewhere where your nationality won't be an issue or come to China and teach another subject, where nationality isn't an obstacle.
If a school wanted a non native English speaker, there are millions of locals they could hire. Accept that if you are a non native speaker who doesn't meet the requirements, perhaps you are hired as a pis aller due to your foreign features than your teaching ability, then put yourself in the position of a Chinese graduate trying to find a job in the language business.
Sure, there will be great teachers from Russia or France who can teach the back end off many a native speaker, but if the PSB had to come and attend a class to see if you were up to the mark or not in your classroom presence there would be visa delays into the months and years. The system is too vast to work on a case by case basis, so it's made the decision to make the educated guess.
Why would the boy going to the US not need British pronunciation? Are Brits and Americans not mutual intelligible? What is the worse offence? use of a British accent or use of ''When it comes to teach English''?
In your IELTS problem are you saying that exams, the sine que non of education and standards, should be done away with? Have you considered that the student who could build an illumination system could function and learn better in his native language than be taught things that, in terms of language, he couldn't understand?
You've come across all sour grapes.