Oh, it's Saturday night so why not:
Start with the basic definition of power:
Power = Work/Time
But in any organisation, as we all know, Knowledge is Power, and Time is Money.
So, substituting, we have:
Knowledge = Work/Money
and, transposing:
Money = Work/Knowledge
Thus, for any given amount of Work, the less Knowledge a person applies to it the greater the Money accruing to that individual.
I respectfully submit the above as an explanation of engineers' salaries world-wide (I am one), and possibly those of a number of other professions too.
