Absent parents ought to contribute to the support of their minor children and states can appropriately invoke the force of law to compel them to do so. Stated so generally, even absent parents behind in their payments would probably agree. Since so many others agree as well, and since the numbers of single-parent children have mushroomed, systems of governmentally compelled support in this country have grown enormously. By the early part of the next century, if current laws remain in force and current population trends continue, most of America's children on any given day will be entitled to support from a parent who no longer lives with them or never lived with them at all.
Chambers, David L. "The Coming Curtailment of Compulsory Child Support." Mich. L. Rev. 80 (1982): 1614-34.