Substitution for a 'Plutocracy' will be -

A government by the wealthy is called Plutocracy.• Plutocracy- English Meaning: A government by the wealthy.- বাংলা অর্থ: ধনিকগোষ্ঠী।• Other options:- A body of nonelected government officials - Bureaucracy (আমলাতন্ত্র)।- A government by a king or a queen - Monarchy (রাজতন্ত্র),- A government in which one person - Autocracy (একনায়কতন্ত্র),Source: 1. Merriam-Webster Dictionary.2. Accessible Dictionary.