Elite is a loosely formed group of individuals that has a lot of influence on culture and government. There's concentration everywhere you look.
For instance there's 6 companies that control almost all of media [0]. There are 10 companies that own nearly all global food products [1]. Look at ETFs and you'll see they own the majority of all stocks (on behalf of others), but they exert a lot of influence on corporate governance. If you look at the board of directors of any of these firms, you'll see the same people and more importantly the same general thinking.
There really aren't any firebrands or unconventional thinkers, so when someone like Musk came around and wanted to wield control over a tiny sliver of the media, people were freaking out. Think about it, even the former president voiced concern[2]. If you look at political donations of the major influential orgs, they're all highly skewed to D [3]. In fact, if you do donate ($534) to R at a large org (Goldman), you'll risk having some editor in the NYT choose to publish your name and donation which could get you fired [4]. You have to admit, something is weird.
Everywhere you look you'll see the same kind of people saying the same ideas. It's not so much that it's centrally organized. It's just that you wouldn't ascend in any of these organizations without holding completely orthodox views on the topic-du-jur.
[0] https://www.webfx.com/blog/internet/the-6-companies-that-own...
[1] https://www.good.is/money/food-brands-owners
[2] https://thehill.com/homenews/senate/3463150-musk-buying-twit...
[3] https://www.businessinsider.in/this-graph-shows-90-political...
[4] https://www.nytimes.com/2016/02/24/nyregion/donald-trump-nyc...