I wouldn't be focused on changing the culture more than focusing on changing the procedures and the leadership voice at this point. The culture will follow. If you have process people first, they may stumble and may not agree with it, but they'll do it. Eventually the next person will come and they won't ask why, and it will change.
Evidence of meeting #118 for National Defence in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was cases.
A recording is available from Parliament.