No. The carpenter is entitled to pay for his work. He's not entitled to additional value the recipient of the work may or may not get from him completing the j

No. The carpenter is entitled to pay for his work. He's not entitled to additional value the recipient of the work may or may not get from him completing the job, unless he negotiates that up front. It seems likely that no one in their right mind would agree to pay the carpenter profit sharing for every transaction that may occur from that building. They'd find another carpenter.