What's wrong with 1 minute? It's just a gesture, after all. No amount of silence can bring back the dead. If a person wants to spend longer in silence, that's up to them - they can spend 10 minutes praying, etc.
[Raak] cf also Emir of Kuwait, rulers of Bahrain, Qatar, Oman etc. Not to mention the Sultan of Brunei. Now, how many of these countries have real, working parliaments with teeth?
I should perhaps point out that I recognize the immense wealth of HM the Q of UK&NI - however, she does not (indeed cannot) act in a despotic way except within her own four walls. Bill Gates can be said to have earned his pile, whatever reservations one has about the business methods of Micro$oft.