Read an article recently that suggested we test out social policy and legislation before we use it. The article cited examples where such testing successfully demonstrated which courses of action yield intended results, and which ones did not.

Testing, for one year or so, in a two or more collar suburbs, 1) one burb that DOES allow undocumented immigrants to be licensed, and 2) another that DOES NOT allow undocumented immigrants to be licensed. Measure data under both schemes, and determine in about 12 months how it works. The more communities that test this, the more data we get about policy nuances, and demographic differences. It's pretty easy, and could allow communities to move forward and successfully achieve goals.