If meetings typically start late, include that dynamic in the norms of your meeting paradigm. Meetings have a poor reputation in most settings. Participants compete, leading to an imbalance of power and no true empowerment. Not always, of course, but these are typical dynamics. Someone conceives of a new or better way.
All actions emanate from a thought or a series of thoughts.
Little incentive exists to shift to a new paradigm unless the old one is perceived to no longer work or create success. In the old meeting paradigm, a boss who controls the group has little incentive to change. For that boss, the old paradigm works. But it does not work for the person whose good ideas are not heard at meetings. When good ideas are ignored, the old paradigm also does not work for the group as a whole.