THat is exactly right: most of these people do not want jobs that allegedly go to foreigners: they want jobs without making sacrifices, they want jobs from which they can retire without a need for retraining --- ever: "What, me? You want me to take courses at night?"
And then they complain that allegedly these jobs were taken by others. It's also funny to hear it when we have the lowest in modern history unemployment.
I don't believe that private employers can require a polygraph exam as a condition of employment in the U.S. There is a "Federal Polygraph Protection Act" in place, I believe. It does not apply to law enforcement or national security positions, but does apply to the vast majority of jobs, I am pretty sure.