They don't just do the demeaning jobs. They work at carpet manufacturers. Furniture manufacturers, and many more that used to employ Americans at decent (but nowhere near astronomical) wages. Now the Americans are working 2-3 jobs at McD's and trying to make ends meet, the manufacturers are squealing with delight at their profits and the American people are stuck with the problem of illegals. I haven't seen any products get cheaper in the past 15 years that aren't already imported. Is your carpet cheaper? Furniture? produce? processed meat?
Now it's hard to find construction crews that aren't all or mostly illegals. I know lots of Americans that would work construction, but not for the $4/$6/hr with no healthcare like the illegals. The illegals get paid cash under the table most times with no SS or taxes taken out. We pay their healthcare. It's insane. Not to mention a good many of the illegals in my neighborhood now are the kind that wear head linen. In fact, several of them were busted by the feds during terrorist sweeps in sep/oct 01.