A government run and controlled by the wealthy.
the wealthy
When you say it's a "rule of the rich", as in the Golden Rule (he who has the gold, rules)."This plutocracy keeps the poor aware of everything...or not."
An oligarchy
the wealthy or professionals or religious clergy or armed forces
The word plutocracy means a government or society ruled by the rich.
sometime in the 1850, meaning rule by the wealthy. It derives from the Greek word Ploutokratia
The rule of the few is called Oligarchy. However, this does not necessarily mean rule by the rich, which is Plutocracy.
Modern depictions of aristocracy tend to regard it not as a legitimate aristocracy (rule by the best), but rather as a plutocracy (rule by the rich).
California is much closer to a plutocracy than a grass-roots democracy
Oligarchy is government by the few. Plutocracy is government by the wealthy few.
Dictatorsbip
a government ruled by the wealthy