The Australian Constitution is heavyweight on the mechanics of federal government, and how heads of power are divided between the state and federal governments, and the role of the court to adjudicate, but quite lightweight on peoples "inalienable rights". There's no "bill of rights" - though there are certain principals like "natural justice" and "customary law". Parliaments are empowered to legislate, and that's what they do. So it's comparatively rare that the court will discover some basis to neuter legislation - though it does happen.