If nothing else, this $4 billion is worth it to the government just so we'll focus our hate on the illegals instead of them.
So it does not cost enough so we should just ignore it? Pass it off as so what. That $4 billion is just a drop of what illegals cost us, then it goes into welfare etc etc etc. Certain groups in America profit from illegals and that is the only reason they are here. If the laws that were already in place were enforce they would go home.
I agree this one issue is only a small part of the problem but as long as we are willing to keep passing off all the small problems they become big problems. The attitude of $4 billion is a drop in the bucket is exactly why the problem even exists in the first place. If you are not part of the solution then you are part of the problem.