[Once-Ler]

The number of employers who have been prosecuted for illegal activity, e.g hiring non us citizens at slave wages, taking false social security numbers or avoiding IRS withholding is practically zero

What is the number, and what is your source.

[seastay]

for starters look here: [Quantifying the problem of immigrant imposters is a challenge; neither the IRS nor the Social Security Administration has tried]

"The secret list of ID theft victims" http://www.msnbc.msn.com/id/6814673/ Jan. 29, 2005