This country is divided not because of boogeyman oligarchs, but because the people themselves hold wildly different views on the course this country should take. The way to fix that isn't by hunting down "oligarchs", but rather figuring by out how to convince more of the American people to support conservative policies and values.
A democracy can only tolerate so much pluralism. When America was a Judeo-Christian country we could agree to disagree on unimportant issues and work together to support a generally common view of the nation.
But because we put "individualism" on a pedestal and began to worship it, our nation has devolved into a roomful of spoilt, bratty and unruly children who must be managed by the "adults".
These "adults" are the oligarchs who tell us we need to get jabbed, wear masks, lower our carbon footprints, celebrate gays, be remorseful for our racism, etc.
The first thread I posted on FR over twenty years ago was the Chapter/Essay from Russell Kirk called the “Errors of Ideology” wherein he warned away from the inverted religion that “a simple saving truth” [ideology] can be found that if we just adhere to this solution all will be saved.
It is a great read why theories such as this in the article are simplified pablum that hopes to save us from the hard work of detailed self government and the hard work of throwing off tyranny.
The essay is worth the short read and can be found:
https://kirkcenter.org/wp-content/uploads/attachments/149150chap1.pdf