Australia's conservative government on Tuesday released a politically contentious federal budget packed with deregulation and tough spending cuts that it offers as a roadmap for returning to surplus within a decade.

The 2014/15 Federal Budget presents Prime Minister Tony Abbott and Treasurer Joe Hockey's blueprint for tackling what they call unsustainable deficits forecast at A$29.8 billion ($27.9 billion) next year and totalling A$60 billion over the next four years.