Work can be considered worship only when one centers their life around Krishna and offers the fruits of their labor to him. Some people work excessively like animals just to gain material profits but forget about God, who should be the ultimate goal. A monk tells a greedy man who brags about being renounced that he is actually more renounced since he has given up God himself in pursuit of wealth, which will eventually be taken by time anyway. The key lesson is that we should make Krishna the top priority before anything else.