Rich white people don't have to immigrate to America to get really richer, they just need to invest in American stocks, buy American companies, or set up corporations in Delaware.  This is why the Australian Rupert Murdoch or the Mexican Carlos Slim can have more influence than almost any other real American citizen on American politics because these billionaires either own or are the largest stockholders in American media and telecommunications companies. Their money and our corporate regulations, just allowed them walk right in and get really rich off of US corporations and companies and they never ever have to think of becoming an American citizen. That's why it's called 'the global economy'.  Poor people only find the global economy when the immigrate.