Ali held that the people should be taxed according to their capacity. There should be no hardship or coercion in the collection of taxes. The system of taxation should be such that the people paid the taxes voluntarily as a religious obligation. The collectors should not indulge in any act which is not liked by the people. They should not collect anything beyond what is enjoined by law. Taxes should be remitted in the case of famine, failure of crops or any other calamity.