The pillar thing I mentioned up stream...
The construction economy would only be "destroyed" if all current and planned construction was speculative, rather than a response to real demand. If there is real demand - ie: people actually need new houses - then the construction industry will continue.
Or are you arguing we should ignore the distortive effects of negative gearing tax policy and its cost on the public purse to keep people employed ? Doesn't sound very free market to me...