The wisdom and public benefit in a forward sale (salam)

Question : Is there a public benefit for the contracting parties?

Answer : Yes, there is a public benefit for the contracting parties. The buyer benefits from an increase in the price, because if a sa' (a dry measure of about 3 kg) is, for example, one Riyal in cash, he buys it for less than one Riyal, is that not so? Good. Does the seller benefit or not? He benefits from the deferral of the price. Yes.