Reign of the Quisling-Rodents

How else does the ramified phenomenon of greed (corruption, nepotism, extreme self-aggrandizement, megalomanic tendencies etc) become nefarious to both the physical and mental worlds of a people either individually or collectively? It brings about a retrogressing, catabatic state in their evolution in both regards, eating back into the socio-economic and political set up of a given society as well...