Excellent point. In our free market economy, employers want to attract and keep talented people. If they pay them less, its the employer who loses. So I don't believe the claims of Fair Tax opponents employers would pay their employees less than they do now. When it comes to getting paid for one's work, workers also have the power to decide for whom they will work.
(Denny Crane: "Sometimes you can only look for answers from God and failing that... and Fox News".)