I don't think so. This is the success of the west. It's the least worse of all the other alternatives. Which other option has worked out better for everyone?

Oligarchy would be the rich controlling the countries in the west. Other than in people's imagination and conspiracies there is no evidence of that actually happening. Was Trump the favorite candidate of the rich in the US? I very much doubt it. Do the rich gain more influence with their money - sure. But not more influence then the rest of the population. The 99.9% have more influence than the 0.1% in aggregate.

The west is the only place on this planet where the corrupt rich do not have absolute control (see Putin). Is it perfect, no? Is it better than those failed attempts to make everyone equal, strong yes.

The top 0.1%, 1%, 10% are still a lot of people. This includes many successful small businesses, it includes large businesses, it includes many. Those people have varied opinions on how countries should be run, just like all of us. But they also have a vested interest in having a safe and free and well functioning society.