I wish more people understood this most basic law of economics.
If the supply of people who are both willing and able to handle the position of university President is low, wages (which are the price of labor) will rise, thus enticing those who are able but not willing to meet the demand. The prevailing average wage rate for university Presidents is simply a reflection of the price point at which the supply and demand curves of capable labor for this position meet. Conversely, if there was an abundance of people who could fulfill this position, wages would decrease commensurately. There is nothing wrong with someone making $1 million, or $10 million, or $100 million for performing a function, provided that wage is being offered to everyone who can perform that function indiscriminately. Of course, a system made up of imperfect agents will not function in a theoretically perfect fashion, but this is more or less how things work. I'm sure that being the President of a university is not without its myriad challenges, and it is unlikely that the average Joe off of the street could perform this function well. Thus, wages for university Presidents are going to be higher than the average Joe's wages. The solution for the average Joe is not to attempt to bring down the wages of the university President, but to aspire to become capable of performing the function of the university President himself.
Simplistic? Perhaps, but sometimes it's advantageous to think of things in simplistic terms. No one escapes the pot when everyone is being pulled back down.