the labor market is not a free market (mainly for the high cost of switching, lack of information, and lack of jobs). Treating it like such is dangerous.
Of course the labor market isn't perfectly free, but it is approximately free, especially in the long run. Price signals do exist. A silly example but it demonstrates the point: if everybody suddenly decided they wanted a massage every day, don't you think the wages for masseuses would go up, ultimately attracting more people to pursue that career? Isn't that a good thing?