This is easily achievable. It would take a few laws but it could be done. No welfare/EBT/TANF/WIC for non-citizens. No schooling (or school meals) for illegals unless the family pays tuition. No free hospital or doctor care. If they go have care and can't pay up front deport them instantly. No driver Licenses without a residency permit. No jobs without a work permit. If someone is caught employing them, shut the business down and arrest the people responsible. If they were paying the illegals under the table, add tax evasion charges. No renting or buying a house (or any property) without a residence permit. I'm sure there are other ways as well. A good one would be to have a program that rewards someone that turns them in - maybe give them a work permit or temporary residence if they help all the time.

The biggest one that would help the most - create a law that requires a database be created that will be updated every time an agency has any contact with an illegal. Then make a law that says places like MoneyGram or Western Union have to cross-check that database to ensure the person trying to wire money back to their home country is not here illegally. If their name is in the database, no transfers allowed and the police are called. The person would then be investigated to see where the money came from since they should have no job. Don't give them the money they want to transfer either until the cops arrive and the investigation is complete.

If things like that are done it will take away most of the reasons these people ignore our laws and come here. They are in many cases currently above the law, and if things get bad they jump back across the border and try again later. Stop giving them everything for free and ignoring their crimes and they will leave on their own.

If Mexico gives us any shit about this, close the land ports. They will do anything to avoid that because a LOT of money goes into Mexico that way.