That hasn’t been my experience with trying plugins like Nations, and the original post for Polis explicitly states that it requires an economy plugin:
Actually, when I asked the respective developers of MCTowns (not a Sponge plugin) and Nations (a Sponge plugin) if their plugin allows admin to have complete control, they both said it wasn’t the point of the plugin, and that the point is to do the opposite, i.e. to give more autonomy to the players. The MCTowns dev specifically said “Nope, that is the point of the plugin” and the Nations dev said that what I was looking for “does not correspond to what Nations is” - full admin control isn’t really an option, as far as I understand.
Yeah, FoxGuard seems to be what I was looking for. I didn’t find it before making the post, because it doesn’t have any of the words I searched for when finding and testing other plugins.