" Hispanic households are more likely than blacks to use “means-tested” programs, or what we consider welfare. In 2005, fully half of all Hispanic families used welfare programs as opposed to 47 percent for black, and 18 percent for whites. Welfare use rises from the second to the third generation of Mexican immigrants.
The Center for Immigration Studies found that every household of illegal immigrants consumed an estimated $2,700 more in federal government services in 2002 than it paid in federal taxes, adding about $10.4 billion to the deficit. The largest federal costs were Medicaid ($2.5 billion), medical treatment for the uninsured ($2.2 billion), food assistance ($1.9 billion), prisons ($1.6 billion), and school aid ($1.4 billion). These figures do not include state and local spending. Non-citizens are ineligible for many forms of welfare. The study therefore concluded that if illegal immigrants were legalized, their increased welfare use would nearly triple the net federal outflow per family from $2,700 a year to $7,700 a year.
Some defenders of immigration claim it will save social security. It will not. Immigrants grow old, just like everyone else, and many bring their aged parents from their home country. They would contribute to the health of social security only if their earnings were well above the native average, which they are not. A study by the Center for Immigration Studies concludes that there is likely to be a Social Security payments crunch, but immigration will not be the solution: “Americans will simply have to look elsewhere to deal with this problem. "

― Jared Taylor , White Identity: Racial Consciousness in the 21st Century