Uhm I disagree.
The students at many of the so-called "international schools" are regarded as "paying customers." Students cannot fail and most get "A". It looks good on the school record.
I am tutoring a couple of students from a fairly well known international school. They speak very poor English and know only a few basic words, yet they "write" an 18 page report on a British monarch and a 15 page report on "how to extract your own DNA" and get A's.
How? Copy and paste + chat GPT, grammarly and so on.
Simarlily, I taught graduate students at a university, but was removed by the head of department, after I upset two girls who were plagiarizing. They were "our paying customers."