Actually I'm not sure it really was...but here's Slob's take on it anyway....
Other sayings which Prime Ministers may have come to regret:
"Most people who know me know that I'm a pretty straight kind of guy." Tony Blair.
"I don't think other people in the world would necessarily take the view that there is mounting chaos." [translated by The Sun as "Crisis? What Crisis?"] Jim Callaghan
"[Devaluation] means the pound is now worth 14pc less on the foreign exchanges. It does not mean that the pound in your pocket or in your purse or in your bank has been devalued." Harold Wilson
"Most people in this country know they've never had it so good." Harold Macmillan
"I bring you peace in our time." Neville Chamberlain
"Psst...wanna buy a peerage?" David Lloyd George (okay I made this one up.)