A theory that makes profit the exclusive norm and ultimate end of economic activity is morally unacceptable. The disordered desire for money cannot but produce perverse effects. It is one of the causes of the many conflicts which disturb the social order.
A system that "subordinates the basic rights of individuals and of groups to the collective organization of production" is contrary to human dignity. Every practice that reduces persons to nothing more than a means of profit enslaves man, leads to idolizing money, and contributes to the spread of atheism. "You cannot serve God and mammon."
Source: Catechism of the Catholic Church (Vatican.va)