Paul Krugman on illegal immigration:
Second, while immigration may have raised overall income slightly, many of the worst-off native-born Americans are hurt by immigration — especially immigration from Mexico. Because Mexican immigrants have much less education than the average U.S. worker, they increase the supply of less-skilled labor, driving down the wages of the worst-paid Americans. The most authoritative recent study of this effect, by George Borjas and Lawrence Katz of Harvard, estimates that U.S. high school dropouts would earn as much as 8 percent more if it weren't for Mexican immigration.
That's why it's intellectually dishonest to say, as President Bush does, that immigrants do "jobs that Americans will not do." The willingness of Americans to do a job depends on how much that job pays — and the reason some jobs pay too little to attract native-born Americans is competition from poorly paid immigrants.
Finally, modern America is a welfare state, even if our social safety net has more holes in it than it should — and low-skill immigrants threaten to unravel that safety net.
Basic decency requires that we provide immigrants, once they're here, with essential health care, education for their children, and more. As the Swiss writer Max Frisch wrote about his own country's experience with immigration, "We wanted a labor force, but human beings came." Unfortunately, low-skill immigrants don't pay enough taxes to cover the cost of the benefits they receive.
Worse yet, immigration penalizes governments that act humanely. Immigrants are a much more serious fiscal problem in California than in Texas, which treats the poor and unlucky harshly, regardless of where they were born.
The question now becomes, "why do those who favor the interests of illegal immigrants hate low income African-Americans and other low income Americans so much that they're putting the interests of foreigner law breakers over the interests of their fellow citizens."