This is total B.S. There are a great many college kids out there looking for employment who can't find work close enough to their colleges. There are also families looking for second jobs for help with mortagages and bills, and there's plenty of LEGAL aliens emigrating from poor countries who would fill these jobs. This utter nonsense about there not being enough American citizens to fill all the jobs out there is just plain ridiculous, as is the claim that Americans would not fill the jobs that would be left vacant by ILLEGALS if they were deported.
There are a lot of jobs, especially in the food industry (McD's, etc.) that go begging because many American kids are too damn lazy to take them. They have been spoiled by parents who want them to have everything THEY didn't have and it's been the ruination of this generation. They don't want menial jobs. They want $35,000 a year. Well, surprise, surprise. You get better paying jobs working your way up.