Waiter, why is a wasp on my chips?

Waiter, why is a wasp on my chips?
Because it died and I didn't know where to put it

This is a joke that was invented by a child. It is actually pretty funny to me, so I need to dissect it in order to determine why that is.

The entire conversation in pretty absurd - why did the waiter pick up a dead wasp in the first place? Why would the waiter not just put the wasp on the floor, in the garbage, down the sink, etc? How many restaurants serve chips and have waiters as well?

This is an obvious riff on the "Waiter, what is this fly doing in my soup?" joke.