Under what set of circumstances are they not a net drain? We have plenty of numbers out there on costs, from what President Obama is asking for a temporary fix, to the average cost of education, to paying for their healthcare needs, to pretty much caring for the kids into their adulthood. Tell me when we get to the positive cash flows there. Don't get me wrong, I feel sorry for the kids too. I feel sorry for kids that are born into horrible situations in North Korea, Somalia,Afghanistan, etc. There are millions of political and economic refugees around the world who have just as compelling of a case. Why are we treating these children differently because they are being taken by criminal organizations to our border? If the morally right thing is to take them all in, why not tell China we will accept any North Koreans that come across? Where does it stop? Why just Central America, what about the kids born in the Mexican towns controlled by the drug cartels? Should they come as well?
I thought I already answered this. Refugee children will grow up to be adults. As adults they are likely to be the best of Americans. That's where their contribution comes in. Of course if one child grows up to be an Einstein it pays for every immigrant in our history, but we don't need that. Hard working patriotic Americans is more than enough, IMO. Well worth the investment.In addition, taking them in would send a message to the rest of the world: we are still different here. We are the greatest nation in the history of the world because we are the only one that has a history of seeking out immigrants and refugees. We want them; we don't turn them away. Again, the impact of such a message to the world, the dramatic effect it would have in renewing our prestige as the greatest nation, is well worth the minor cost of taking in these children.
Finally, as to your question where does it stop? If I had my way it wouldn't. But the reality is one case at a time.
Those of my religion were turned away from this country when they fled mass murder. They came in desperate creaky boats which were not allowed to land on our shores. Sometimes the boats sank, killing everyone aboard. Other times the boats were sent back by American officials to Europe, where the passengers were sent to the death camps. Maybe we can make up for a little of that horror now.