If I could just go quickly on that one, it's a good idea in principle, but it doesn't make a difference if you don't actually hold anyone accountable. There are lots of examples I can think of right off the top of my head in government, even related to procurement, where there's one minister who's theoretically responsible for projects that I would be charitable in saying aren't going all that well, and there doesn't seem to be any accountability within that single department.
On February 7th, 2017. See this statement in context.