In the exercise of its power to prescribe just and reasonable rates for the transportation of passengers or property by common or restricted common carriers by aircraft the Commission shall give due consideration, among other factors, to the inherent advantages of transportation by such carriers; to the effect of rates upon the movement of traffic by such carriers; to the need, in the public interest, of adequate and efficient transportation service by such carriers at the lowest cost consistent with the furnishing of such service; and to the need of such carriers for revenues sufficient to enable them, under honest, economical, and efficient management, to provide such service.