RULE OF THUMB
Ben Hogan used to practice this way. John Daly is one the best examples to watch in the modern game.
Try making a swing without any contact of the right thumb on the grip. This encourages you to feel the left side hitting against the ball, stops you scooping and flicking, resulting in a more consistent and twice as powerful impact position. Your head will stay down and your weight will transfer naturally. The simple act of taking the right thumb off the shaft removes the link between our hands and brain telling us to lift the ball.
WIDE CHOICE
Wider soled clubs are helping to get the ball in the air.
This is a good thing because the golfer is concentrating on swinging through the ball rather than under it. The higher the ball naturally goes, the less the golfer feels the need to help lift it. If you are somebody who is catching the ground before the ball, try out a wider soled iron as they are a lot more forgiving.
