Add new rule “Stealing” as follows:

No more than once every week any monkey with less than X bananas may steal (where X is the total number of bananas held by all monkeys, divided by the total number of monkeys, rounded up). To steal the monkey either takes one banana from any monkey with more than X bananas or, the monkey takes two bananas from the single monkey with the greatest amount of bananas (If 2 or more monkeys have the same amount of bananas, and no other monkey(s) has more bananas, no single monkey has the greatest amount of bananas).

May need tweaking but just wanted it to it the idea out there.