I edited that part out later, but in any event, I didn't write that they necessarily are arrogant, but that it inadvertently could make them sound as if they are. Let's imagine an envoy from the WTO or UN or whatever is put to the task of evaluating the quality of education in various 3rd world countries. Because of the position of English in the world today, inevitably one of the metrics of the quality of education worldwide is the students' proficiency in English. Now, imagine if that envoy is himself English. Then his job basically becomes to go to Burkina Faso or somewhere else halfway across the world and say "On average the students in your country are not very fluent in my language, so naturally your education system sucks. Get on that right away, will you?"