The desire of material goods has limits but the desire for money is different. Saint Thomas Aquinas in his admirable logic explains that material goods, represented in the concrete form of food, clothing, houses, land or other products, all have definite limits based on production and consumption. The very nature of these commodities is also fixed by the organic needs and capacities of the user. An individual, for example, can only eat and store so much food.
But money can be accumulated without such limit and the desire is to have ever more 
without restraint. Saint Thomas points out that the idea that there should be no limits upon any human function is absurd. All life exists and functions within the very narrow limits of temperature, air, water, food or other restraints. To claim that money alone should be free of such definite limits, says Saint Thomas, is an aberration of the mind that must be rejected.