Do I understand correctly that you're saying the people who control the gov't right now should choose to call an early election that they're almost certainly going to lose? That seems unlikely.
They morally should put it back to the people as they've failed at it internally twice, but nobody seriously expects them to intentionally do it.
They could accidentally find themselves cornered into it if they can't pick a new leader
That doesn't seem to be the way current conservative parties operate though.
Some would suggest that has already happened and they would have got away with it if it wasnt for those pesky international financial markets trying to limit their exposure to the impacts.