Let's think about this for one second, Who is he paying taxes to?
The government or his Boss?
and how is he paying them, using a phony SSN to pay them?
I say his boss is pocketing the taxes and telling the illegal that he has paid them, In short Millions of dollars in taxes are being pocketed by those employers telling Illegal aliens that they are paying taxes.
"An Individual Taxpayer Identification Number (ITIN) is a tax processing number issued by the Internal Revenue Service. It is a nine-digit number that always begins with the number 9 and has a 7 or 8 in the fourth digit, example 9XX-7X-XXXX.
IRS issues ITINs to individuals who are required to have a U.S. taxpayer identification number but who do not have, and are not eligible to obtain a Social Security Number (SSN) from the Social Security Administration (SSA).
ITINs are issued regardless of immigration status because both resident and nonresident aliens may have U.S. tax return and payment responsibilities under the Internal Revenue Code."
http://www.irs.gov/individuals/article/0,,id=96287,00.html#what
In short, congress wants to raid the BILLIONS that they are telling you they want to spend.