So Vince Cable thinks that two journalists, masquerading as constituents, have brought their profession into disrepute.
Not half as much as the rest of us think that Cable and some of his more venal colleagues have brought Parliament into disrepute by masquerading as public servants.
When is Mr Cameron going to keep his word and start culling MPs? Don't hold your breath.
That is another promise that will go the way of so many politicians' promises.
These people will say anything except their prayers.