Verses such as this one are so common in the Bible—especially the Psalms—that I fear traditional Christianity has grown weary enough of them that they're simply ignored. Instead of having a Christian ethic guided by such frequent calls to economic justice, conservative Christians appear to be fascinated by the rare verse that condemns certain behaviors, regardless of whether or not their understanding of those behaviors is the correct one or their translation an accurate one. As a being created in God's image, however, I need to hold myself accountable when I read of God's priorities and who it is that God takes notice of.
Whether I feel myself in need or encounter the poor, O God, help me, like you, to take notice of injustice. Grant me compassion for others just as I would have it for myself, for this is what you teach me in the Hebrew Bible and what Jesus taught me in the New Testament. It's in his Name, after all, that I pray. Amen.