Silenced is golden.
He's incapable of keeping his counsel, preferring a speech to getting on with the daily grind of government.
And Mr Cameron doesn't think before he opens his mouth, his rash comments on the single currency making steeper the uphill battle of other leaders to stabilise a financial system that we rely on too.
Mr Cameron should remember the old adage and, if he can't think of anything useful to say, he should do everybody a favour by saying nothing.
This Government has a dangerous knack of undermining public confidence on virtually every occasion a Cabinet Minister speaks.
From Theresa May on policing, via Andrew Lansley on nursing, to William Hague's insulting call for us all to work harder, Mr Cameron and his Cabinet spread despair.
Talking down the UK and the EU is the obsession of a Conservative Party quick to find faults to divert the electorate's gaze from the Government's own incompetence.
So a period of silence would be extremely welcome from Cameron & Co. Zip it, Dave.