Totally meaningless statement by Cameron!

Apparently, in an interview to be shown on ITV tomorrow, David Cameron has said that he would sack George Osborne from the post of shadow chancellor if necessary.
What are the probabilities of him never finding it necessary?
This sort of statement is typical of Cameron; it sounds good but is totally meaningless. I might easily say that I would divorce Mrs EP if necessary, but this hardly seems likely after more than 40 years.

In the remote eventuality of Cameron sacking Osborne, my choice as a replacement would be John Redwood, at least he writes sense in his blog which I always find worth reading.