Too Big?
There's a common problem with public sector contracts and projects. It's not really that they are too big as such, it's that they are bigger than initially thought and too big for the people managing them.
This is typical of this type of project. Somebody came up with the idea and didn't spend enough time scoping the project. 12 years on and virtually no real progress? Thats the ultimate expression of project creep.
I've been involved in projects where decisions are taken during development that something previously considered in scope is now ruled out of scope (usually because it's too difficult), other things that were out of scope are now in scope (either because they should have been in scope all along, or because the organisation has changed during the project) and where there are continual arguments about what the scope actually is. The end result being that the project goes nowhere because people are still arguing about the scope after the planned finish date for the project has already passed.
By now somebody should have realised that it's almost pointless to continue. Cut your losses, kill the project and start again. Only this time scope it right in the first place. Sometimes when you've actually completed scoping the project you realise it's not even viable. That's fine. All you need to do is go back and redefine what the project is.