Pope John XXIII
Mater et Magistra §129
Mater et Magistra: On Christianity and Social Progress
129 In this way, agriculture will absorb a larger amount of industrial goods and require a better system of services. But at the same time it will provide both industry and the services and the country as a whole with the type of products which, in quantity and quality, best meet the needs of the consumer and contribute to the stability of the purchasing power of money—a major consideration in the orderly development of the entire economic system.
Source: Mater et Magistra (Vatican.va)