That employees tend to rise to the level of their incompetence is the Peter Principle, formulated by Dr. Laurence J. Peter and Raymond Hull in their 1968 book The Peter Principle. It is also too often true. Some brave souls realize the predicament and voluntarily return to the last level at which they could preform competently. Fortunately for the others, admitting that you have promoted someone to a position for which he is incompetent is rather awkward unless you are the owner, so they tend to stay in their positions until something really bad happens. As the Dutch said while fighting the Spanish: "It is not necessary to have hope in order to persevere."
Well, I haven't. My law would be more on the lines of: "ET (and other internet) browsing expands to fill the surplus of time allotted for work completion. And a bit beyond that often, creating a scramble to finish work that could have been completed in advance". Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi