The workers who don't get jobs for the position applied for, may not have the profile and job match. This is does not imply that they may get demotivated. Feedback after an interview may not be imperative. Over qualified and in solicited resumes are myriad..
I think we should not think about the one side of the coin only. We should think about other side also. If we think from employer perspective , probably we will get the answer to this. Being the employer, they are having some expectations from employees before hiring. If the expectations are not met it is obvious that the chances of hiring is less.