Why Asian, African and South American countries don't need immigrants to come and settle in their countries?

I wonder why Eagle was too dumb to check before asking such a silly question? In 2009, South Africa was the sixth "most popular" nation to immigrate to (from all over the world) MILLIONS of Viet are immigrating into China The MAJORITY of people living in Brazil are immigrants from other nations. http://en.wikipedia.org/wiki/Immigration_to_Brazil You may well have a "real question" or some valid point you wish to make about something, but you failed miserably at it!

The US does have a work visa program. And we allow immigration here because this country was founded on just that, immigration.

In a nutshell, they come here because they want to come here. There is actually a lottery with a waiting list. We don't need to recruit people. In fact, we can't get rid of people. They literally die trying to get here any way possible, legally or illegally. I'm not sure where you got the idea that we need an immigrant population for a workforce or to populate the country. The U.S. is the 3rd most populace country in the world, only behind China and India. "Just ten countries absorb the majority of that migration, with the U.S. leading the pack by a wide margin. The most important factor that determines a country’s rate of immigration is the availability of jobs, Janne Batalova, an immigration policy analyst at the Migration Policy Institute, told Life’s Little Mysteries. With America still running the world’s largest economy, it is little surprise that people moving to the U.S. account for 20 percent of the entire planet’s immigration, according to the U.N. Department of Economic and Social Affairs. Russia and Germany, two more countries with top 10 economies, follow behind the U.S. with about 5 percent of the world’s immigrants each. "In terms of the U.S., it's widely known that no other countries can really match the economic, educational, and social mobility for people in all walks of life," Batalova said. But while the economy is important, the openness of the society also determines how many immigrants enter a country. In Japan, xenophobic laws and traditions keep immigration numbers low, despite harboring the world’s third largest economy, Batalova said."