Here is a link I found from Jovenes Inmigrantes Por Un Futuro Mejor (JIFM)
Young Immigrants for a Better Future
at Texas A&M University
Dispels many of the myths we are hearing on talk radio in Texas...
Exerpt:
The estimated seven million or so illegal immigrant workers in the United States are
now providing the Social Security system with a subsidy of about $7 billion a year. (The New York Times)
Immigrants contribute billions of dollars annually but receive no public pension in retirement, are not eligible for Medicare, and are not entitled to any other benefits. (Social Security Administration)
Most undocumented workers pay taxes, and they pay a variety of taxes. (The New York Times)
The money that undocumented immigrants paid in 2004 added up to about 10 percent of that year's surplus - the difference between what the system currently receives in payroll taxes and what it pays in pension benefits. (Social Security Administration)
http://jifm.tamu.edu/imfacts.htm