Over time and with increasing complexity, returns on investment in society begin to level off and turn negative. Once the easy irrigation projects are completed, society begins progressively larger projects covering longer conduits with progressively smaller amounts of water produced. Bureaucracies that started out as efficient organizers turn into inefficient obstacles to improvement more concerned with their own perpetuation than with service to society. Elites who manage the institutions of society slowly become more concerned with the their own share of a shrinking pie than with the welfare of society as a whole. The elite echelons of society go from leading to leeching. Elites behave like parasites on the host body of society and engage in what economists call "rent seeking," or the accumulation of wealth through nonproductive means--postmodern finance being one example.
Excerpt from: http://www.amazon.com/Currency-Wars-Making-Global-Crisis/dp/...