Some jobs remain unfilled because not enough skilled workers , manufacturers say . Robert Frum : Immigration policy has emphasized admission of unskilled labor . We may hope that over time the children and grandchildren of America 's immigrants of the 1990s and 2000s will do better than their parents and grandparents . He says pool of new workers more suited to economy of last generation . Frum : U.S. policy should emphasize admitting highly skilled immigrants .
Some jobs remain unfilled because not enough skilled workers , manufacturers say . Robert Frum : Immigration policy has emphasized admission of unskilled labor . He says pool of new workers more suited to economy of last generation . Frum : U.S. policy should emphasize admitting highly skilled immigrants .