Its not just illegal immigrants, there are a lot of legal citizens driving around without insurance too. I bet half the members of ImportAtlanta are driving with their licenses suspended for racing or speeding, no insurance, etc. You'd be a fool not to carry uninsured motorist coverage nowadays. I'll definitely be adding it to the Ford once its on the road. Not that it would help much given that insurance companies are all pretty evil.
Most illegal immigrants would probably be in brackets exempt from paying taxes if they were legal, because they make so little. And they do pay sales tax, so theres that. What would probably help would be putting a tax on the money transfers they use to send money out of the country.
I really don't think illegal immigration will be solved until conditions in Mexico and central America improve. If you lived in a place like this...
You'd do whatever it takes to get yourself and your family out. I haven't been to Mexico, D.F. myself but from what I have studied and from what I have heard from friends who have went there on mission trips and such, I wouldn't wish that life on anybody