Veritatis Splendor §100

¹⁰⁰ The Catechism of the Catholic Church affirms that "in economic matters, respect for human dignity requires the practice of the virtue of temperance, to moderate our attachment to the goods of this world; of the virtue of justice, to preserve our neighbour's rights and to render what is his or her due; and of solidarity, following the Golden Rule and in keeping with the generosity of the Lord, who 'though he was rich, yet for your sake... became poor, so that by his poverty you might become rich' (2 Cor 8:9)". The Catechism goes on to present a series of kinds of behaviour and actions contrary to human dignity: theft, deliberate retention of goods lent or objects lost, business fraud (cf. Dt 25:13-16), unjust wages (cf. Dt 24:14-15), forcing up prices by trading on the ignorance or hardship of another (cf. Am 8:4-6), the misappropriation and private use of the corporate property of an enterprise, work badly done, tax fraud, forgery of cheques and invoices, excessive expenses, waste, etc. It continues: "The seventh commandment prohibits actions or enterprises which for any reason — selfish or ideological, commercial or totalitarian — lead to the enslavement of human beings, disregard for their personal dignity, buying or selling or ex- changing them like merchandise. Reducing persons by violence to use-value or a source of profit is a sin against their dignity as persons and their fundamental rights. Saint Paul set a Christian master right about treating his Christian slave 'no longer as a slave but... as a brother... in the Lord' ( Philem 16)".