Wow! What planet are you from?
You haven't heard of the most rampant polygamy area of this country? Hildale UT @ tip of AZ border -- & just to the south of that border, Colorado City, AZ? And you somehow (mistakingly) thinks this leads to getting kids off the welfare rolls? You have got to be kidding, right?
In 2001, the Los Angeles Times reported that welfare fraud is widespread in both Hildale and Colorado City. As many as half of plural wives are on government assistance. The fraud arises from the women's claims that they do not know the whereabouts of the children's fathers. Source: http://en.wikipedia.org/wiki/Hildale,_Utah
Oh, and guess what? Hildale-Colorado City are pretty rural -- as in quite isolated rural.
Sounds like a law enforcement problem rather than a refutation of my argument. What are these people doing to support themselves in those “areas” I’ll bet they are not growing crops-other than drugs.)