David Frum : Immigration ` ` ' '' is a deliberately ambiguous term . For some people , immigrants are a source of cheap labor , he says . Others : Big wave of immigration coincides with decline in labor 's share of economy . Stories like this are often told about the J-1 visa program , which brought about 109,000 students to the United States in 2011 . America does n't have a labor shortage , but wages may be too low , he says .
David Frum : Immigration ` ` ' '' is a deliberately ambiguous term . For some people , immigrants are a source of cheap labor , he says . Others : Big wave of immigration coincides with decline in labor 's share of economy . America does n't have a labor shortage , but wages may be too low , he says .