Being in Iran you wouldn't know this but the australian coach has been criticised heavily(I mean heavily) for playing old players and not blooding youth, we do have young talent coming through, kruse and oar are both starters playing in Germany.
We have also have rhys Williams, James holland, Thomas rogic, Mathew leckie, Lowry, chris herd, sorata, Eli balbalj, zullo, troisi and more playing in Europe, the coach simply hasn't bothered to use them. I personally think Rogic has big potential, they might not be as good as what Viduka, Kewell and Cahill were but we have talent and the local A-league is starting to produce good local young players.
Also between 2004-05 there was no national competition in Australia which disrupted player development. I think we will see a younger side in brazil, at least I'm hoping so.