Kapital Substitution

In this cartoon I suggest that there are reasons why employers retain labor other than productivity.  I have seen Blue Tooth technology replace receptionists and cashiers around town.  I was wondering when the same technology would replace my wife at her work.  (This cartoon is not intended to be anything more than a cartooning.)

My wife has to collect money when clients leave.  This task uses tact and personality.  These traits are lacking in computers.  All of the human traits that make people do business are what completes a trade.