Random Thought today

So, with the city of Detroit being basically forced into bankruptcy, and the difficulties that California has faced in the past, I had a random thought.  I know that random thoughts can be dangerous and lead one on a path that really ends up leading nowhere, but here goes anyways.

We all know that immigrants tend to send money home to the family, that is one of the reasons that immigrants move here, is to get better paying jobs than they could back home and to then use that to support their families back home. This I have no issue with, as those immigrants are usually legal, pay their fair share of taxes, and are generally law abiding.

My question, and if anyone has ever seen a decent study of this please let me know as I couldn't find