That some are single, separated, or divorced is a problem. The Right talks a lot about Family Values, and the Left talks a lot about a Living Wage. With some modifications in vocabulary, this could be a single successful discussion. Parents could spend time with kids if a single salary could support a family. For most Americans this is no longer the case.
Most kids are now latch-key kids, and many no longer use the label or worry about the problem.
Now that neither parent can stay home there doesn't seem to be much happy feminist liberation in women's working outside the home, and certainly no talk of men's working in the home. Following what I believe was the sixty-ninth serious shooting incident in an American school, thousands cried out that guns don't kill, people lacking moral training kill. And many thousands more expressed disgust at the idea of psychologists stepping in to help troubled kids. That's the parents' job, of course. But the parents aren't around.