This video clip of John Piper hits the nail on the head.
What John Piper does here is not only expose the lies of the prosperity gospel but he exposes how even evangelicals have been tainted by the message. I have posted a paper on II Corinthians 3-4 touching on the same subject from another angle.
My prayer is that men and woman who love Jesus would stand up and proclaim the riches of Christ and how he surpasses the riches of this world! That we may stand with Paul and consider all things as excrement compared to Christ!