With all the discussion, I find these words from John Piper to be right on. I agree heartily with his point, and love his brevity in making it. Answering the question, "Should the church work on social and political problems?", Piper writes:
Yes . . .
If you mean: Ten million Christians should take 10 hours a week spent watching TV, and give that time to worthy social and political engagement.
No . . .
If you mean: The pastors should leave their Bible study and pulpits and counseling and evangelism, and put that time into politics and social ministries.