[azemetre]

For this analogy to hold, wouldn't there have to be some way to withhold all people from applying to a job? Why would a company want to do this if it just increases the cost of hiring? What is the benefit to paying more for a workforce when you can just hire people normally.

The alternative could be like a $2000 fine per listing violation. To make it worthwhile to enforce, offer half the fine as a tax credit that can be claimed anonymously after an investigation.