plutocracy [ploo-tok-ruh-see] noun, plural plutocracies. the rule or power of wealth or of the wealthy. a government or state in which the wealthy class rules. a class or group ruling, or exercising power or influence, by virtue of its wealth. kleptocracy [klep-tok-ruh-see] noun, plural kleptocracies. a government or state in which those in power exploit national resources and steal; … More Panama Papers: Plutocracy, Kleptocracy, or Both?