Don't get me wrong in answering this I do not want to appear to be a liberal fan as they are not a lot better around public infrastructure albeit less watefull but probably do even less than labor over time.
We appear to have a choice in this country; liberals who privatise or do PPP projects so we all pay for our infrastructure in taxes and then when we use it and many worthwhile public infrastructure just does not get done.
or
labor; who have a crack at building stuff but appear to want to build things which are politically motivated. I believe good infrastructure can give a party political credibility but only in the long term. It is actually often painfull for the party who embarks on anything dramatic but in the long term people will say, well lucky the Labor party got that bridge built etc. I just am not sure we will ever say that about the NBN.
What you are saying above however in my view is that their wastefull (OK, you do not call it wastefull) fiscal stimulous allowed us to make it through the GFC. I agree it did, but Keynes explained that (para.) while anyone can bury bottles of money to be dug up by punters* or build pyramids to create activity and employment our thinking public servants and politicians could surely come up with things that would meet future demand like public infrastructure. It would appear to me he was wrong on the capacity of politicians...
It is easy to raise aggregate demand with fistfulls of cash, the difficult thing that only good governments understand is to spend it in a way that will provide capacity to meet future demand. School canteens and insulation and cash handouts do not do this.
I actually had some confidence in Rudd at first when he spoke of infrastructure Australia and building a big austrailia (which I later learn't was just having an australia with 50million people but building nothing...) but then as infrastructure Australia were passing down their to do list, he was already throwing cash out because he said none of those jobs were shovel ready! I don't know but I would have said throwing money away when perhaps 6 months later even after a technical recession we could have been powering away with 40bn odd in public infrastructure like new ports, rail, airports, roads, hell even fast trains for the green voters! Surely more worthy than school halls and cash handouts?
Again labor often gets the talking bits right at first but then fail on deliver. I actually agree less with the Liberals just concentrating on debt. They could have saved billions more or spent it on infrastructure but handed it back in tax cuts. I could not care (and nor would ratings agencies) if Australia had a large fiscal deficit as long as we were building something that allowed us to pay it back. I cannot see cash handouts nor school halls doing this.
* We did not even bury our cash handouts as most Australians would not know which end of the shovel digs we just handed the cash out.