It's a lie that's part of the other lie of 5% unemployment. This is anecdotal, but there's plenty more. Just google "jobs americans won't take".
"AMERICANS LINE UP FOR SWIFT CO. JOBS
I have news which I'm sure will shock President Bush, Senator McCain and every other blow-hard who insists illegal aliens are doing jobs Americans won't don't--American citizens are literally lining up out the door applying for the jobs vacated by the deported and arrested Swift Co. illegal alien workers. (HT Miss Jessel).
As all of us have been saying for years--it's not that Americans won't do those jobs--they can't because the jobs are being stolen by illegals. How perfectly ironic--illegal aliens stealing everything from this country, including the very identities of Americans."