“A wealth-and-prosperity doctrine is afoot today, shaped by the half-truth that says, “We glorify God with our money by enjoying thankfully all the things He enables us to buy. Why should a son of the King live like a pauper?” And so on. The true half of this is that we should give thanks for every good thing God enables us to have. That does glorify Him. The false half is the subtle implication that God can be glorified in this way by all kinds of luxurious purchases.
If this were true, Jesus would not have said, “Sell your possessions, and give to the needy” (Luke 12:33). He would not have said, “Do not seek what you are to eat and what you are to drink” (Luke 12:29). John the Baptist would not have said, “Whoever has two tunics is to share with him who has none” (Luke 3:11). The Son of Man would not have walked around with no place to lay His head (Luke 9:58). And Zacchaeus would not have given half his goods to the poor (Luke 19:8).
God is not glorified when we keep for ourselves (no matter how thankfully) what we ought to be using to alleviate the misery of unevangelized, uneducated, unmedicated, and unfed millions. The evidence that many professional Christians have been deceived by this doctrine is how little they give and how much they own. God has prospered them. And by an almost irresistible law of consumer culture (baptized by a doctrine of health, wealth, and prosperity), they have bought bigger (and more) houses, newer (and more) cars, fancier (and more) clothes, better (and more) meat, and all manner of trinkets and gadgets and containers and devices and equipment to make life more fun.”
John Piper in Money: The Currency of Christian Hedonism (Chattanooga: Generous Giving, 2003) 17-18.