Plutocracy
Public.icon
プルトクラシー
https://en.wikipedia.org/wiki/Plutocracy
Plutocracy is a society that is ruled or controlled by people of great wealth or income. The term was first used in English in 1631.1 Unlike most political systems, plutocracy is not rooted in an established political philosophy, and historically has been criticized.
In ancient Greek, the term is derived from πλοῦτος (ploutos), meaning "wealth" and κράτος (kratos), meaning "power".
However, in Making and Breaking Plutocracy, it seems that the position is to proceed on the assumption that this is the case.