OK. Here's the problem. HOW do you invest the money? You can't give it to airlines, that's not legal, unless you cook up some more barking pseudo PSO routes. The terminal doesn't need money spent on it, it can easily handle the passengers it is likely to get. The road links and rail links to the airport are about as good as Bristol's.
Why not just get international flights from Cardiff Airport.......
Bring on the magic wand then.
I have argued repeatedly that the only sustainable way to build the airport is to prove to potential operators that a viable and profitable market exists. The fact that no-one seems willing to do this reminds me of Michelson–Morley in reverse - they went looking for something they thought was there, perhaps in CWL's case no-one is looking for something they think isn't....
TA