I forgot to say, it also doesn't really matter what they want to do, if the money isn't in the kitty to build the airport, no-one's able to move there!
I do wonder though that if money that's been spent on the new concourses, along with at least a bit of money from the state, and maybe (I dread to say it) some cash reserves were put together, would they be get close to the cost of a second runway and a terminal big enough at DWC to move sooner? Railway line might cost a bit too, though, I suppose...