What tends to happen, is that teachers think that walking into a classroom is enough
but it simply isnt. They then realise that they can be paid 200 RMB an hour and once
they start earning that, they think see it as easy money, when actually they are doing
nothing to earn it, other that walk into a classroom as a native speaker. In an ESL
classroom, it may be fine, but students who care, can tell if a teacher is prepared or
not. Then students tend to lose respect for those particular teachers. In a REAL SCHOOL
a teacher needs a real plan which is designed for the needs of individuals and their
personal development.

Real schools hire real teachers. Whose fault is it if you hire unqualified teachers, fully aware of their lack of teaching qualifications?

You have the option of hiring Chinese teachers that are fully qualified to teach English. You also have the option to hire fully qualified foreign teachers of English. In your particular case, you have the option to hire qualified Korean teachers of English.

You choose to hire white faces without genuine teaching credentials because your business model is based on satisfying parental demand for white faces but truly qualified foreign teachers demand 20-30,000 rmb a month and first class housing.

ESL certification does not qualify anyone as a 'real teacher' and it does not qualify anyone to teach children.

You are running a hospital where the nurses perform surgery. You have only yourself to blame.