If we sell them they cease to be assets.
The capital becomes a fungible book entry incapable of tangible merit or ability to evidence return. Further more we loose strategic control of the ability to internalise the benefits of the structures we depend on... we may as well sell the Selwyn River Bridge to a body corporate upon whose whim, tolls will be paid. It is insulting to render a taxation per use on the very folk whose asset it once was.
That makes it worse than theft.
We had an earthquake, to whom is is logical that it is a 'good idea' we sell the undamaged bits?
The power of the collective asset and asymmetry of analysis is all the more ironic given the PGG Building was a civic asset built by and for the Christchurch Drainage Board without whom our city would neither be the shape, size or reclaimed from swamp that it is.
Or that we might want to make a Park out of much of it in honour of the collective loss.