How does it continue?

I had a friend that worked their briefly several years ago and this is what he told me.

Basically all the kids come from rich families. The parents are busy doing what ever and have sent the kids to boarding schools. By the time they make it to KIS they have generally been kicked out of boarding schools in Korea.

The reason they don't close the place down is they are only mistreating Korean students, some Korean and native speaker staff, and a handful of Chinese staff. Meanwhile the school brings money into the local economy so a blind eye is turned.

Also the parents of the students attending the schools are inattentive to the situation and have probably never even been to the campus.

So that is one theory how the place continues.