[mc32]

This kind of thing also occurred in the USSR because the native Russians were underperforming, so many elite institutions had implicit quotas such that one might have answers struck down in qualifying exams for being “too right”.

It’s a hard political problem (both the discriminated against and the ones benefitting from the quota have a valid argument). Obvs an unbiased solution would be to admit the best, regardless, but for social reasons, it may not be optimal.