Our current government here in the UK is doing this at the moment. They even revoked a university's license to accept foreign students on a technicality. We make a fortune out of foreign students and with our demographics need them far more than the US, but according to the Daily Mail reading grey brigade if we packed them all off home, all our troubles would be over. Because simplistic, sweeping, poorly thought out solutions to deep rooted cultural and economic issues always work out so well.