I agree, the monkey that does what you described shouldn't be forced to pay taxes.
But I am still confused as to why the monkey and his family can't attend private schools, drive on private roads, receive medical services from a private doctor, and donate any bananas he voluntarily decides to contribute to right the wrongs of his monkey island :)
In my opinion, the other monkeys that are trying to force him to subsidize other monkeys' consumption habits are just trying to collect rent from him!