All of these people can get cheaper college education in their country of birth than in USA. So that's a plus. They can come back with a H1B visa to pay taxes

All of these people can get cheaper college education in their country of birth than in USA. So that's a plus. They can come back with a H1B visa to pay taxes in the US. I bet a lot of them could even qualify for residency in Canada, an even better opportunity for them with more reasonable immigration policies.