Bishie -
Just because someone is undocumented doesn't mean they can't file tax returns. In fact, for the past two years around tax time, there have been news stories about how undocumented immigrants do file tax returns. Per the IRC, the information in tax returns is privileged and confidential.
But for more info on that issue, go <a href="http://immigration.about.com/od/uslegaltroubles/tp/UndocsFileTaxes.htm">here</a>, <a href="http://www.newsmax.com/archives/articles/2007/4/16/170927.shtml?s=lh">here</a>, <a href="http://iblsjournal.typepad.com/illinois_business_law_soc/2007/04/undocumented_ta.html">here</a>, and <a href="http://www.nydailynews.com/boroughs/2007/03/08/2007-03-08_income_taxes_and_the_itin_.html">here</a>, for examples.
Seriously, just Google "undocumented 'tax returns'" and you will find a wealth of information.
<em>>>Are lenders really willing to look at financials of all 12 countertop installers genuinely living in that house in the IE (several of whom are probably illegal and hence working under the table / using false security numbers)? </em>
Actually, those lenders are dying to have those folks as clients. Check out B of A.
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>>There are . . . issues in this example: a) not all 12 are likely on title</em>
And the ones that are better be trustworthy. There is nothing less fun than a title fight over who are the equitable vs. legal owners of the property. You want a scam that will hurt Hispanics (or, really, anyone else)? One that involves someone with "legal" status ostensibly "investing" the wages of those that aren't and then booting the undocumented persons out of the property. "They gave me money because they were just renting," the person on title tells the judge.
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>> Since ownership is tax advantaged through the mortgage interest deduction this is effectively a transfer from Hispanics to whites like Social Security.</em>
Yes, the tax code is a reverse Robin Hood and which is based on race, not income. Not. I take it that you are unaware of the Earned Income Tax Credit? I have to say, I was completely unaware that only Hispanics paid into Social Security and that white folk were the only recipients. I know I've been less than careful in my phrasing at times, so I'll assume that that was the case with your comment here.