Pope John XXIII
Mater et Magistra §69
Mater et Magistra: On Christianity and Social Progress
69 Nevertheless, in some of these lands the enormous wealth, the unbridled luxury, of the privileged few stands in violent, offensive contrast to the utter poverty of the vast majority. In some parts of the world men are being subjected to inhuman privations so that the output of the national economy can be increased at a rate of acceleration beyond what would be possible if regard were had to social justice and equity. And in other countries a notable percentage of income is absorbed in building up an ill-conceived national prestige, and vast sums are spent on armaments.
Source: Mater et Magistra (Vatican.va)