The world is much more complicated that economic theory and Friedman would agree with that. Economic theory is a staring point because you can not model all the variables.
Fogul is another economist that won a nobal prize that approach the social issues. His theories would apply to the lack of parenting, growing unprepared work force, cost of no wellfare vs cost of it, etc.
See you can't manage this stuff by itself...think about building a house and you change the width of a room and watch how it ripples though the rest of the house