The punchline from Mohler's commentary:
Prosperity theology is a False Gospel. Its message is unbiblical and its promises fail. God never assures his people of material abundance or physical health. Instead, Christians are promised the riches of Christ, the gift of eternal life, and the assurance of glory in the eternal presence of the living God.
In the end, the biggest problem with prosperity theology is not that it promises too much, but that it promises far too little. The Gospel of Jesus Christ offers salvation from sin, not a platform for earthly prosperity. While we should seek to understand what drives so many into this movement, we must never for a moment fail to see its message for what it is -- a false and failed gospel.