Not sure if anyone's picked up on it yet (I don't have the time to read through all the posts here and in the spoiler section…) but that scene with Nami spying on that conversation is a parody from a famous skit in Japan called Akudaikan (悪代官) I'm pretty sure.
Here's a version that Shimura Ken did if anyone is interested.
Apologies if somebody has already brought this up.