I cannot stress enough that this nation was founded on self-sufficient people who were generally law-abiding, and it will collapse on welfare-dependent people who don't give a damn about anyone else but themselves. What was John F. Kennedy's message? "Ask not what your country can do for you; ask what you can do for your country."
Society, because it is overloaded with dependents (lawful or otherwise), is unable to manage the number of miscreants who walk the streets. Some of the liberal strongholds have reached the point where corporations want to move out, businesses close up in indigent neighborhoods, and homeless public defecation in the streets has been witnessed