So if the government replaced our fleet of commodores, falcons and others with porches; the second hand market for cars would stay the same (in price)?
I am not quite sure what the critical part of your scenario is. Are you asking what will happen tot he price of second hand cars if all of our cars were replaced by Porsches (and the old cars just vanished). In other words will the prices go up because second hand cars are now Porsches?
Or are you asking me what would happen if the government sold its entire fleet of cars at the same time (and the fact that they are being replaced with Porsches is largely irrelevant)? If it's this second thing, then I really can't see what it has to do with what we were talking about so I'm going to go with the former.
If every single car was replaced by a Porsche, the market for second hand cars would stay the same. You have to understand that the price of a second hand car is simply what someone is willing to pay for it. This will be determined by many things that have nothing to do with the brand of the car. These things include: what other cars there are and how much the owner wants for them (answer in this case = all other cars are Porsches as well so that won't help, and some owners will be more desperate than others to sell), how much money they have, how much they can get their hands on, how desperately they want a car.
The only reason Porsches attract higher prices than other cars right now, is that people are willing to pay more for them; one of the reasons for that is that Porches are 'status' symbols. Good luck making them status symbols if every man and his dog has one.
Short answer: if every car on the market is a Porsche, then the price of Porches will drop but the overall market for cars won't change.
Same with houses. The value of a property is not the sum of the costs of all of its parts - it is simply the price someone is willing to pay for that property. Money doesn't come from thin air. If every house gets a $5000 upgrade (e.g. NBN connection), it does not follow that every person looking to buy a house will suddenly be willing or able to spend an extra $5k on their house. It's not like a real estate agent could argue that this house is somehow special because it has NBN - so what if it does? the house next door also has it and the one in the next suburb. In fact every house the buyer was considering has it, so why would any buyer pay more for a feature he could get on every other house? I don't see what's so complicated here.
Well, that was before the change in government. Now, the NBN connected houses do indeed have a value-adding feature.
And why should a poor non-property owners have to pay and take the risk exposure to cost blow outs to upgrade the property of the rich?
You'll have to explain the logic here a bit more for me.
Notwithstanding, I'd say now a poor tenant is even worse off as he will be at the mercy of his landlord who doesn't really have much of an incentive to go broadband (unless maybe the week before he puts the property on the market). Tight landlord = no broadband.