Back when I worked for a large organisation, we had a term: “seagull manager”. It described someone, usually a consultant, who flew in, made a lot of noise, dumped on everyone from a great height, then flew out again, leaving others to deal with the consequences.
Parachuted into action more than two years ago, Cameron squawked hysterically about difficult decisions, the mess he inherited, a new kind of politics and the big society (whatever happened to that?). Since then, he has proceeded to spend the majority of his term, so far, defending arrested pals, disgraced ministers, fiascos, scandals and u-turns.