Now here's a wrinkle – four years ago, Mr Letwin said in the Times that:
David Cameron's right-hand man Oliver Letwin has been caught dumping secret papers in park waste bins.
The PM's blundering policy adviser was seen on five separate days throwing away sensitive correspondence on terrorism, national security and constituents' private details.
The suggestion then was that Mr Letwin was just the man to establish the framework within which people would behave responsibly. Now it seems perhaps that he isn't.
Cameron Conservatism puts no faith in central direction and control. Instead, it seeks to identify social and environmental responsibilities that participants in the free market are likely to neglect, and then establish frameworks that will lead people and organisations to act of their own volition in ways that will improve society by increasing general wellbeing.
Psychological note: Everyone including Tony Blair had a good laugh at Mr Letwin's "sociocentric frameworks" and "econocentric paradigms" but his article was actually a bit serious and had something to do with "nudging", i.e. getting people to behave properly without passing laws all the time, an unimpeachable objective which somehow becomes sinister in his hands.
Obituary: his article was also intimately linked with the death of the Conservative party.