I Can't Believe I Missed This! Teresa Nielsen Hayden:
Subterranean Special Science Fiction Cliche Issue: I always remember the moments when I’ve run into something I hadn’t realized was missing from other books.... That wonderful moment in Chushingura where the feudal retainers, meeting in their castle to decide whether they’re going to go to war with the central government, discuss how much of the paper currency they’ve issued is still floating around unredeemed. (They have to redeem it before rebelling, they decide; otherwise they’ll leave the peasants holding worthless paper.)
Ah. The footnotes tell me it's from the Kurosawa version, which I have not seen.