http://www.smbc-comics.com/comic/fish-3
Alt text
This is more easily executable with a three-wish genie, but it’s good to be prepared for all circumstances.
Bonus panel
http://www.smbc-comics.com/comic/fish-3
This is more easily executable with a three-wish genie, but it’s good to be prepared for all circumstances.
The bonus panel mentions infinite gold created from nothing, so I think duplication is allowed. Each time the neighbor gets all of the fisherman’s money, the total amount of gold is magically doubled.