As a rule change proposition, I suggest if:

13-4/8 When Club Touches Ground in Grass in Water Hazard
Q.If a player's ball lies in a water hazard, when is his club in tall grass considered to be touching the ground in the water hazard, in breach of Rule 13-4b?

A.When the grass is compressed to the point where it will support the weight of the club (i.e., when the club is grounded).

Could we have the same logic for grounding a club in a bunker. I would call it the Anna Nordqvist rule.