Answer:
power-elite model
Step-by-step explanation:
The power elite model is extremely similar to the oligarchy system. But the 'select few' that have the power in society does not have to necessarily a Nobel.
For example, units States is a power elite model even though we don't have a group that we consider as 'nobles here'. But when you clearly examine its power structure, you will realize that the control over the country falls to a small group of people such as military leaders, corporate owners, high ranking government officials and their family, etc