The Prime Minister should encourage this for three reasons. First, it would provide him with a series of possible options for the next manifesto. Second, it would give him an insurance policy against the Coalition collapsing — he’d have a ready alternative programme. Finally, it would be constructive use of MPs’ time. One of the most dangerous things for Cameron is a parliamentary party that is bored and feels underappreciated.
Of course, there also need to be people who act as policy outriders for the Coalition. But that is a story for another day.