Deport criminal and non-productive aliens.
Require that any prospective citizens pass a basic civics test. Require a basic understanding of capitalism. Basic health checks must be made at ports of entry. Anyone with communicable diseases should be turned away. Require proof of family affiliatioin and integrity. Jail cayoties. Drug mules shoyld be housed in a work camp in the middle of Alaska, 200 miles from anything. Speed up the system for attaining citizenship .Aliens must be willing to assimilate before citizenship.