...Is immigration, I asked--especially illegal immigration--good for the economy, or bad? "It's neither one nor the other," Mr. Friedman replied. "But it's good for freedom. In principle, you ought to have completely open immigration. But with the welfare state it's really not possible to do that. . . . She's an immigrant," he added, pointing to his wife. "She came in just before World War I." (Rose--smiling gently: "I was two years old.") "If there were no welfare state," he continued, "you could have open immigration, because everybody would be responsible for himself." Was he suggesting that one can't have...