He who pays the piper calls the tune

A Piper blows his pipe and produces sweet music to entertain anyone who pays him. He is bound to play a tune as desired by the man who pays. Similarly, if a man pays the wages of a laborer to water the plants in his garden the latter must perform this work in accordance with the desire of the farmer who pays. He cannot do anything else. If somebody sends his servant with some money and asks him to buy oranges and not mangoes or any other fruit. If a man hires a taxi and asks the driver to take him to Calcutta the latter must take him to Calcutta and not to any other place. It follows from these examples that things must be done according to the desire of the person who pays. Anything which he does not desire cannot be done. It is so obvious.