In analogy with the advice in the article, married people should regularly go on dates with other people, just to make sure that their value in the "relationship market" doesn't sink too low (and to avoid unpleasant rebound after a divorce, which is always a looming possibility).
It doesn't feel quite right, but I cannot entirely put my finger on why. I guess you could argue that employee-employer relation is like a relationship with a psychopath, so the above is in some way a "practical" advice. But then perhaps there is a lot more social issues going with that conclusion (companies are psychopaths) than just job promotion.