Not so simple with the system of government they have...all of the powers of government are delegated from the Monarch’s power and done in the Monarch’s name...their troops are sworn to protect the Queen as our troops are sworn to protect the Constitution. The Monarch gives the government legitimacy to exist as the Constitution here gives our government legitimacy to exist (although of course...it seems the government does not obey its words all too often).
His Royal Chuckness had better tread lightly if and when he does become king. He seems the type to try to rule and not just reign, and I don’t see any prime minister putting up with it. The British politicians may find a way to see him and the Firm off for good if Prince Nitwit becomes even more annoying and meddlesome as king.