You can see that very thing on the second page of that PDF document that you linked above, as the SSA outlines "what" makes for an unauthorized worker.Sorry, Hack. The term, "unauthorized worker" does not appear in the PDF document at all.
Do you have a reference which defines the term, "unauthorized worker" where non-citizens are going to be receiving SS benefits?
The term, "unauthorized immigrant" does appear and does refer to what, before the Arbusto Administración came into power, used to be called, "illegal immigrants"
Here's what the second pages has to say about "unauthorized immigrants":
Totalization Agreements and Benefits for Unauthorized Immigrants
- Whether or not a totalization agreement exists, unauthorized immigrants may receive credit toward Social Security for their work, but they cannot collect benefits while living in the United States until they obtain legal resident or U.S. citizen status. In addition, under the recently passed Social Security Protection Act of 2004 (P.L. 108-203), a non-citizen must have been authorized to work in the United States at some point during their career in order to be eligible for benefits, effective for individuals filing for benefits based on Social Security numbers issued on or after January 1, 2004.
- A totalization agreement with Mexico has no effect on retired or disabled workers who are Mexican citizens living outside the U.S. who already have enough credits in the U.S. Social Security system to qualify for benefits. Generally, non-citizen retired or disabled workers living outside the United States for more than 6 consecutive months may not receive benefits unless they meet one of several exceptions. For example, a non-citizen retired or disabled worker may receive payments outside the United States (including benefits based on unauthorized work in the United States) if he/she is a citizen of a country that has a social insurance system that pays benefits to eligible U.S. citizens residing outside that country, which Mexico does.
- A totalization agreement overrides benefit restrictions to non-citizen spouses and children. Under current law, non-citizen spouses and children must have lived in the United States for at least five years (lawfully or unlawfully), and the family relationship to the worker must have existed during that time in order for them to receive benefits while outside the United States. A totalization agreement overrides this requirement.
Points two and three are especially telling about the intent of this totalization agreement:
2) Non-citizens may receive benefits if their government has a system which pays benefits to eligible US citizens residing outside that country. Since Mexico has such a system, they're automatically authorized. It doesn't matter that Mexico's government is rife with corruption or whether any US citizens actually receive benefits. Only that Mexico has such a system.
3) Previously, a non-citizen's family must have lived in the US for at least five years in order to receive benefits. This totalization agreement overrides this requirement. Presumably to waive the five year requirement, which means that they're automatically able to receive benefits regardless of how long they've been here. (illegally)
Now, you can support the Arbusto Administración's efforts to give away US tax dollars to illegal immigrants and you can call it what ever you want, but a spade is still an effing shovel and this is one big effing shovel.
I've said this before and I'll keep on saying it: Jorge Arbusto, like his father before him, never met a big government snake oil he didn't like.
And you never did explain what happens to the illegals already here when don't sign onto Jorge Arbusto's non-amnesty amnesty program.
"Sorry, Hack. The term, "unauthorized worker" does not appear in the PDF document at all. " 
Lets not get into girlie man nuances. Here's what that document says:
"According to the GAO 1 , the proposed agreement will likely increase the number of unauthorized Mexican workers and their family members eligible for Social Security benefits.
Mexican workers who previously lacked the required 40 quarters of coverage could qualify with as few as 6 quarters of coverage (benefits would be prorated to reflect only credits earned in the U.S.).
More family members of Mexican workers would become entitled, because the agreement waives rules that prevent payments to non-citizen dependents living outside the U.S.
According to SSA, approximately 50,000 U.S. and Mexican workers would receive a pro-rated “totalized” benefit from Social Security after the first five years of the agreement (this number does not include those newly eligible for family benefits)."
Also, notice that the whole agreement applies to a mere 50,000 people. 47,000 legal Mexican workers employed in the U.S., and 3,000 legal U.S. workers employed in Mexico.
All of the above are now exempt from Mexico's double-tax on wages, courtesy of this agreement.
Goodness, the sky really is falling...
< /mocking >
5 Legislative Days Left Until The AWB Expires