From Systemantics, the systems bible:
While Systems-people share certain attributes in common, each specific system tends to attract people with specific sets of attributes. For example, people who are attracted to auto racing are likely to be people who enjoy driving fast, tinkering with high-powered cars, and beating other people in fierce competition. The System calls forth those attributes in its members and rewards the extreme degrees of them. But a word of warning is in order. A priori guesses as to what traits are fostered by a given system are likely to be wrong. Furthermore, those traits are not necessarily conducive to successful operation of the System itself, e.g., the qualities necessary for being elected president do not include the ability to run the country.
Systems attract not only Systems-people who have attributes for success within the system. They also attract individuals who possess specialized attributes adapted to allow them to thrive at the expense of the system, i.e., persons who parasitize them. As the barnacle attaches to the whale, these persons attach themselves to systems, getting a free ride and a free lunch as long as the system survives.
A copy of the Systemantics 1975 edition is online, at The Ohio State University, which probably doesn't know that it's there.