"Any prayers that are self-consuming, self-indulgent, self- aggrandizing; any prayers that seek whatever I want no matter what God wants; any prayers that suggest God must deliver because I have demanded it—those are prayers that take His name in vain. Such praying is an egregious sin against the nature of God, against the will of God, and against the Word of God.
"Name it, claim it" prayers; the notion that God wants you always healthy, wealthy, prosperous, and successful; and lists of selfish requests are all quite at odds with the spirit of Jesus’ model prayer. Such requests are expressly excluded from the many promises that God will hear and answer our prayers (James 4:3). The faulty belief that underlies all such praying is no small error. It is rooted in a serious misunderstanding about the nature of God.
Because prayer is an act of worship, to offer a prayer based on such a heinous perversion of God’s character is tantamount to worshiping a false god. To put it bluntly, when someone presents God with a wish list rooted in greed, materialism, or other expressions of pure self-interest, then demands that God deliver the goods as if He were a genie, that is no prayer at all. It is an act of blasphemy. It is as abominable as the crassest form of pagan worship." —John MacArthur