Allah (swt) did not say: And when they give measure for them to indicate their control over the economy in taking and giving. They take in full and extra to the degree of oppression and they give with undervalue and loss. Hence, this Surah indicates how much exploitation and influence Quraish used to have at that time; people were working hard and getting tired, then these masters used to come and take the fruit of their labour. To show how ugly this act is, these verses come during the Mekkan era, contrary to what was known at that time in concentrating on doctrine matter and implementing it firstly in souls before talking about method and behavior.
أَو وَّزَنُوهُمْ (or by weight): This is another trick to give less and take more, because during measure there is a capacity available to whoever wants to add more by shaking it by the hand which uses it to take more than is deserved or by adding on top of it to hold more, these tricks are known by merchants, whereas weight is more precise and it is difficult to manipulate.
This meaning is wide and it is not confined to matters of selling and buying, measuring and weighing but it goes beyond that to include all life matters and every right and obligation. For the worker, the farmer, the clerk, the manager, the minister and anyone who has a job should perform his duty fully as long as he takes his full wage and if we want the stabilization of materialistic, economical, moral and social life, we should put the Truthful’s (swt) balance of right in front of our eyes, we should give by the same measure we take, but giving less and taking more will cause a gap in community and problems will arise that we cannot get rid of.