"Do your homework."
"Just try your best."
"But," arms folded while looking at scratched notepaper, "I just can'tttttttt."
"But you're not trying!"
In a nutshell, that's the fruitless conversation between the Dept. of Labor ["DOL"] and employers who petition foreigners through the labor certification process. The employers -- after advertising for qualified candidates -- state they cannot find U.S. workers and the DOL responds with great disbelief.
This disbelief is shocking considering that the DOL specifies what the job offer must say (the requirements must be "normal" for the job) and how much the employer must pay (the prevailing wage). At the end of the recruitment process, the DOL cannot accept that the employer denied U.S. workers correctly. More and more often, the DOL audits the employer for documentary proof of recruitment results. An audit is a years-long process. While this insane conversation goes on, the job remains unfilled. And a foreigner who could be working, buying a house and paying taxes to the U.S. economy waits ... and waits.