The Conservatives are promising to eliminate the entire deficit by 2018 and run an absolute surplus thereafter. And when the deficit is gone, they are promising widespread tax cuts. All of this if they are re-elected, of course.
But in this post at Pieria I look at what they would have to do to deliver these promises, and conclude that it's not at all clear how they can eliminate the deficit in that timeframe, let alone deliver tax cuts. There's a very large hole in their fiscal plans.