If presiding over the decline and fall of the British Empire, the beginnings of the dissolution of the Union, and best part of 40 years of Tory short termism are a good example of a constitutional monarch; then bring on the Republic.
Charles has been a vocal critic of most things we get wrong in society, though won't be allowed to do that for much longer.
Don't worry, the shortfall of oil, fresh water, food and land will cause the much needed shake up if we are unable to see beyond the end of our noses and deal with it ourselves in a planned manner. (I havent given up all hope - not yet).