ah cool, you are right, I was taking it all a bit seriously. Hard to judge tone on here.
Ya those figures I just made up to be ultra-conservative for the math. But really, with any realistic population growth rate, we will be building enough houses. We need like 5% per annum consistently to push the limit based on 5k homes per quarter - and 5% per annum is way higher than now!
The 150k workers over next 5 years is just some dude pulling it out of his hat. I don't think the person doing that calc has put much thought into it, or on whether these workers have families.
I think we can agree the population growth/shortage spruik is pretty ubiquitous in other places right before the bubble burst?