I think it would be hard to say it's an oligarchy. There's 450 or so active admins (and around 900 total), and really, they don't truly have that much power. The vast majority of decisions on Wikipedia are made by editors, and on occasion admins get involved.

This isn't a country with some ruling class. 450 people aren't in cahoots to stop you from editing.

>But they sure have oligarchies.

Then name one of the relevant oligarchs