A deep but accessible breakdown of how bracket creep works inside the Australian tax system. This piece explains the difference between marginal and average tax rates, why raises often feel smaller than expected, and how hidden mechanisms like Medicare levies and tax offset phase-outs increase the real tax burden on workers over time. It also explores fiscal drag, demographic impacts, and why governments benefit from inflation-driven tax growth. Built using analysis from the Australian Parliamentary Budget Office and OECD tax data.