Governments are still afraid of raising taxes, which given the mess everyone is in, needs to happen once we start getting back to normal, or the feds need to crank up the presses and print enough money to buy out of it that way.
Agreed tax hikes can wait a while, but really the feds should be the ones pulling their finger out here and building more infrastructure. Considering the insanely low interest rates we are likely to have (and for a very long time indeed, if Europe of Japan is anything to go by), and the very large capacity that the federal government has to issue AUD in Australia (a special power that nobody else has), it is insanity not to try and build this properly up to scratch. The way things are going now, we'll all be working on infrastructure projects in a few years time anyway. Now really is the time to be building infrastructure that will reshape the national economy.