Try offering your players the chance to rule the kingdom, the world, the galaxy, or whatever, through some sort of obviously messed up bureaucratic bungle. The error should be clear to the PCs, but to nobody else. They really can live like kings and be in charge of everything - if only they take up the opportunity and don't tell anyone that there's been some sort of horrible mistake.

Some players will leap at the chance. Let them get away with it. For a while.

Other players... well, that's even more fun. Watch them squirm as they try to decide what they should do about it.

Transcript

Obi-Wan: I'm sorry, Anakin. You're under arrest.
[SFX]: Whooom {Obi-Wan turns on his sword}
Anakin: Old friend... I was hoping I wouldn't have to hurt you too.
[SFX]: Whooom {Anakin leaps at Obi-Wan}
[SFX]: leap...
[SFX]: Whooom! {they fight}
Obi-Wan: Oh dear.
[SFX]: Kzrkzrkk!
[SFX]: Whooom!
[SFX]: Whooom!
[SFX]: Whooom!
R2-D2: For crying out loud, Ben. The rest of us are okay with ruling the Galaxy. What part of that don't you like?
Obi-Wan: I wrote "Good" on my character sheet and I jolly well meant it! Unlike some people!
R2-D2: We can use the Peace Moon for good as well!