Our engineers and architects are and always have been world class which is why we export these talents globally.
What is not world class at delivering infrastructural projects is our political system. Our desire to lead the world by appearing to protect the individual over greater societal constructs (political hierarchies/responsibilities/due process, legislative requirements/processes, judicial oversight, ngos, corporates etc) results in nothing of significance being executed quickly. It is exacerbated further by the lack of political will to underwrite the huge, potentially open ended costs – eg Energy Generation whilst the private sector baulk at the unpredictable risk/reward and mid-project political agenda swings. Swings and Roundabouts.