Immigration, not education?

From Zakaria's post-American world:

The United States is currently ranked as the globe's most competitive economy by the World Economic Forum. It remains dominant in many industries of the future like nanotechnology, biotechnology, and dozens of smaller high-tech fields. Its universities are the finest in the world, making up 8 of the top ten and 37 of the top fifty, according to a prominent ranking produced by Shanghai Jiao Tong University. A few years ago the National Science Foundation put out a scary and much-discussed statistic. In 2004, the group said, 950,000 engineers graduated from China and India, while only 70,000 graduated from the United States. But those numbers are wildly off the mark. If you exclude the car mechanics and repairmen—who are all counted as engineers in Chinese and Indian statistics—the numbers look quite different. Per capita, it turns out, the United States trains more engineers than either of the Asian giants.

But America's hidden secret is that most of these engineers are immigrants. Foreign students and immigrants account for almost 50 percent of all science researchers in the country. In 2006 they received 40 percent of all PhDs. By 2010, 75 percent of all science PhDs in this country will be awarded to foreign students. When these graduates settle in the country, they create economic opportunity. Half of all Silicon Valley start-ups have one founder who is an immigrant or first generation American. The potential for a new burst of American productivity depends not on our education system or R&D spending, but on our immigration policies. If these people are allowed and encouraged to stay, then innovation will happen here. If they leave, they'll take it with them.