In school today we learned from economists about how immigrants are very good for the world economy, the nations which receive them, and the nations they leave.  Even if your motive is money, the mixing of peoples and differences is, after all, a very strong force for good.  I think this proves the world was onto something when it made the USA, the country in which we learned such truths this day, and all the other lands where diverse mixtures of people love and play