Wow....such an easy concept.  However, having been searching for almost 2 years, I can attest to the fact that these examples do not happen.  Case in point, I interviewed 4 times with a major financial institution, even going as far as meeting 2 of the executives away from the office.  I was, however, not provided with an email or phone call as to the determination of the outcome of my interview.  That was 4 months ago.  What goes around, comes around, so paying it forward would be a great way to start for recruiters, contract companies and hiring companies.  In the not too distant future, you too could be where I am today.