Yes, it certainly is! And the Churches make sure to reap as much money as they possibly can out of it. :D Nobody ever asks for their money back! Even when they pray for years and never get a thing they pray for. Of course, it's their own fault. They didn't pay enough!
"Is God willing to prevent evil, but not able? Then he is not omnipotent. Is he able, but not willing? Then he is malevolent. Is he both able and willing? Then whence cometh evil? Is he neither able nor willing? Then why call him God?" --Epicurus. One of the best quotes ever in my opinion.