They preach a Jesus who is your cosmic concierge, not a Savior.
I like that that turn of phrase. My favorite term is to call their God a heavenly ATM. Punch in the right password and He spits out blessings.
The prosperity gospel is a heresy, that is, it is in contradiction to the plain teaching of the New Testament. Christ told his disciples they would be persecuted for the sake of the Gospel. Paul prayed for healing for a "thorn in his flesh" and was denied, and wrote that he would be content in whatever condition he found himself in. Almost all the Apostles died as martyrs, as did thousands of other Christians in the early days.
Say this prayer, name it and claim it, and your material position will be improved is nowhere taught in the New Testament. You're sick and you're not healed? You must not have enough faith. You're poor? Surely you haven't taken advantage of God's promises because he wants everyone to be rich.
Gag me with a spoon. (Showing my age there.)
Never mind that Christ repeatedly railed against the pursuit of material wealth and warned that the rich had no easy road to salvation. Camels and needles and all that.
Yes, the infinite God of the universe is truly an ATM — for those who want to fleece the flock. Peter was told to feed the sheep; prosperity gospel preacher think they're the ones who should be fed.