Here is John Piper, a highly respected American Bible teacher stating why he hates the triumphalist/prosperity message so much. I agree with John. His position is exactly the same position which UK Apologetics adopts on this topic. Please go through this. It only takes ten minutes to play. John and I would agree on many Bible-based topics but not exactly all. He is Calvinist/reformed in perspective. He is, I believe, a most sincere man.
This, by the way, is a quality video and will play on full screen really well.