Establish a massive scale guest worker program, tell them that any worker who wants work can sign up and register and will be provided free access to come and go into and out the US without trouble and minimum wage so their low socio economic status is removed from the equation (hilarious I know, since the minimum wage hasnt been increased since 97 because republicans dont believe in inflation). At least it will keep track of the problem in terms of numbers and will work against drug cartels throwing immigrants in harms way by using them as drug mules.