Australia on Monday said it would tighten visa rules for international students and low-skilled workers that could halve its migrant intake over the next two years as the government looks to overhaul what it said was a “broken” migration system. Under the new policies, international students would need to secure higher ratings on English tests and there would be more scrutiny on a student’s second visa application that would prolong their stay.Australia on Monday said it would tighten visa rules for international students and low-skilled workers that could halve its migrant intake over the next two years as the government looks to overhaul what it said was a “broken” migration system. Under the new policies, international students would need to secure higher ratings on English tests and there would be more scrutiny on a student’s second visa application that would prolong their stay.