The Roman Catholic Church
The Church teaches that it is part of our nature to work:
Human work proceeds directly from persons created in the image of God and called to prolong the work of creation by subduing the earth, both with and for one another. Hence work is a duty: "If any one will not work, let him not eat." Work honors the Creator's gifts and the talents received from him. It can also be redemptive. By enduring the hardship of work in union with Jesus, the carpenter of Nazareth and the one crucified on Calvary, man collaborates in a certain fashion with the Son of God in his redemptive work. He shows himself to be a disciple of Christ by carrying the cross, daily, in the work he is called to accomplish. Work can be a means of sanctification and a way of animating earthly realities with the Spirit of Christ. Catechism 2427
In work, the person exercises and fulfills in part the potential inscribed in his nature. The primordial value of labor stems from man himself, its author and its beneficiary. Work is for man, not man for work.
Everyone should be able to draw from work the means of providing for his life and that of his family, and of serving the human community. Catechism 2428
The Church teaches that in your job, everything you do must be above board. For example, if you make a contract, you must keep it:
Promises must be kept and contracts strictly observed to the extent that the commitments made in them are morally just. A significant part of economic and social life depends on the honoring of contracts between physical or moral persons - commercial contracts of purchase or sale, rental or labor contracts. All contracts must be agreed to and executed in good faith. Catechism 2410
The Church also teaches that it is wrong to exploit others. This may mean not working for companies that have been shown to use child labour, such as the Gap and Nike. It may mean paying a fair wage to your emplyees:
The seventh commandment forbids acts or enterprises that for any reason - selfish or ideological, commercial, or totalitarian - lead to the enslavement of human beings, to their being bought, sold and exchanged like merchandise, in disregard for their personal dignity. It is a sin against the dignity of persons and their fundamental rights to reduce them by violence to their productive value or to a source of profit. St. Paul directed a Christian master to treat his Christian slave "no longer as a slave but more than a slave, as a beloved brother, . . . both in the flesh and in the Lord." Catechism 2414
The Church also warns against the love of money. This means individuals should not just try and get the highest paid job possible, but should think about the type of work they are doing. It also means that companies should not focus soley on profit.
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. Catechism 2424
