I find this hysterically funny, and yet when I show it to people they do not seem to share my sense of humour. Maybe it is because I have a different prospective, but I think it transcends "service" industries in general. I know from experience that when paying for a service, sometimes all I need is that little bit of follow-up. You know, the phone call from the auto shop that tells you ahead of time that your car will be delayed and why - before you go to pick it up.
Sometime these calls are hard to make because of the potential for negative feedback, but necessary when looked at from the prospective of a returning client or future business referrals.