It may not be that they realize the very large potential losing money, but also health risks. Most of these kids have diseases that we've eradicated from the US and they aren't being screened or treated properly. They're just shipped out into the public. When immigrants from Ireland and other European countries came over during the Potato Famine, they were screened for serious diseases and anyone who had even the slightest hint of a disease was isolated and treated. We have better technology, today so I don't see why we can't.