Everyone thinks they can make it in America. Immigration will continue to make up for expatriation. And it won't be a problem, because America is a continent and not the british isles.
How bad do things have to get here before people stop coming do you suppose? Here's an interesting article about the slowing of Mexican immigration:
http://www.nytimes.com/2012/04/24/us/mexican-immigration-to-... From the article....
"The report presents a striking change from earlier findings by the Pew Hispanic Center on the number of Mexicans who have been returning to their country. While earlier Pew studies said the data did not show any exodus, the report published Monday includes new data from the 2010 Mexican census revealing that about twice as many Mexicans returned home from 2005 to 2010 than in the previous five years. In all, about 1.4 million people moved from the United States to Mexico in that time, the Mexican census showed"