The Chinese had them from about 605 until 1905.
The term comes from the latin: Mandare: To rule. They did so in China, controlling access to the throne and enforcing and interepereting the laws and edicts of the Emperor. They were rife with corruption and essentially answered to no one.
We have them today. They control the bureaucracy of our government just as they controlled the government of Imperial China then. They are, essentially powerful men and women woth no worries about liability for their actions.
Don't believe me?