This problem has at least two levels. Change the law, and relatively easy to deal with mid to large employers that hire criminaliens. The harder one is the home-cleaning under the table jobs. In between are the LLC/incorporated landscaping, roofing contractors, and the like. Here in MA, it is quite hard to not at least occasionally contribute to the problem (I'll presume myself guilty).
There are whole segments of service industries that are completely criminalien, and when using those services, you may be hard pressed to stay legal. What is needed is a sea-change of changes, perhaps Trump has the idea, that can fix these areas.
Simply put. If we detain and deport immigrants here illegally, those involved in grounds keeping, roofing, etc will be swept up or motivated out of these positions. As they leave wages and incentives will increase for American workers. Those Americans, primarily young kids 16-25 will find it profitable to get out of their mom’s basement and behind a lawn mower or on a ladder painting and laboring.
Once the cost of a roof or painting job increases 10%-25% in order to cover the additional costs of hiring an American work force. Mom may decide her special snowflake can mow the lawn instead of Pablo.
The reason employers don’t want to hire American kids is that they are spoiled lazy and are more expensive than illegals. Ed illegal workers and American kids will start to get jobs, learn some responsibilities and finds out that working in labor positions makes them strive to get better grades and degrees in fields that allow for working in air conditioned offices instead of the hot sun.
Right now we give them the choice of working in air conditioned offices or playing video games in mom’s basement.