An oligarchic system is one where political power lies predominantly in the hands of a small privileged elite. But it’s not a binary concept, the current US system is less oligarchic than it was in the 19th Century, or the Venetian Republic for example. What did you mean?
Less corrupt systems than the one in the US can and do exist.
I might be assuming too much of what you meant by oligarchic.
An oligarchic system is one where political power lies predominantly in the hands of a small privileged elite. But it’s not a binary concept, the current US system is less oligarchic than it was in the 19th Century, or the Venetian Republic for example. What did you mean?