Northern Light
Superstar
I think it's a lot more politically feasible to drastically reduce the issuance of new visas/TFW applications than to expel people who are already here. Even making it much more difficult to come here will be unpopular with immigrant communities.
Foreign students I would allow to stay until their course of study is complete, there is a clear and logical promise there.
How is a TFW entitled to remain indefinitely?