Both theorems of the Ersatz doctrine are fallacious. First, it is not true that the quality and suitability of the substitute are of no importance. If soldiers are sent into battle badly nourished and equipped with weapons made of inferior material, the chances for victory are impaired. Their action will be less successful, and they will suffer heavier casualties. The awareness of their technical inferiority will weigh on their minds.
Ersatz jeopardizes both the material strength and the morale of an army.
No less incorrect is the theorem that the higher costs of production of the substitutes do not count. Higher costs of production mean that more labor and more material factors of production must be expended in order to achieve the same effect which the adversary, producing the proper product, attains with a lower expenditure . It is tantamount to squandering scarce factors of production, material and manpower. Such waste under conditions of peace results in lowering the standard of living, and under conditions of war in cutting down the supply of goods needed for the conduct of operations. In the present state of technological knowledge it is only a slight exaggeration to say that everything can be produced out of anything.