Here's a rundown of a campaign I just thought of: The Gnomes have taken over the banks of a powerful nation and blackmailed the monarch into accepting paper fiat currency. Heroes have been vilified and are forced to vouch for the deep state or be physically assassinated or character assassinated by a network of spies and bards working for the king. If this particular nation falls, the entire world falls because the deep state are demon worshippers who wish to turn the world into a new plane of the nine hells.