To Justin's request for biblical stuff..
Amos 2:6-7
6 This is what the LORD says: "For three sins of Israel, even for four, I will not turn back {my wrath}. They sell the righteous for silver, and the needy for a pair of sandals.
7 They trample on the heads of the poor as upon the dust of the ground and deny justice to the oppressed.
Amos 4:1
1 Hear this word, you cows of Bashan on Mount Samaria, you women who oppress the poor and crush the needy and say to your husbands, "Bring us some drinks!"
Micah 2:2-3
2 They covet fields and seize them, and houses, and take them. They defraud a man of his home, a fellowman of his inheritance.
3 Therefore, the LORD says: "I am planning disaster against this people, from which you cannot save yourselves. You will no longer walk proudly, for it will be a time of calamity.
Malachi 3:5
5 "So I will come near to you for judgment. I will be quick to testify against sorcerers, adulterers and perjurers, against those who defraud laborers of their wages, who oppress the widows and the fatherless, and deprive aliens of justice, but do not fear me," says the LORD Almighty.
Ezekial 18:12-13
12 He oppresses the poor and needy. He commits robbery. He does not return what he took in pledge. He looks to the idols. He does detestable things.
13 He lends at usury and takes excessive interest. Will such a man live? He will not! Because he has done all these detestable things, he will surely be put to death and his blood will be on his own head.
Ezekial 22:29
29 The people of the land practice extortion and commit robbery; they oppress the poor and needy and mistreat the alien, denying them justice.

These I got off the top of my cursory search. I am sure there are more.