August 14, 2012. Mark Koba reports for CNBC.

In the end, Kallick says his study is not about solving U.S. immigration problems – which seem unsolvable anytime soon. And Kallick adds that immigrants – legal or not – can’t cure the nation’s economic woes. But he says they have played an important part in the country’s past and are needed for its future.

“What we see is that immigrants don’t just come to the U.S. as workers but also as consumers and entrepreneurs and that helps the economy expand,” Kallick says. “We don’t make policy but we need a system that’s fair so immigrants can come here legally. It would be better for the economy if we did.”