The NBN call from Abbott was for a cost benefit analysis, not a business case. However I can see the Conroy idea in a business case, that if you get higher speeds you can charge more for the data quicker.
The matter of local airport ownership was a product of ALP thinking which, I believe, Dick was forced to implement. I agree there is no case for recycling the assets no matter who is running the show. I'll study your links.
I have an idea something called "the Amsterdam or Dutch syndrome" is the end product of inflated current prices.
I like the way you think.