Sydney, Australia.

Australia's struggling Labor government on Tuesday used the last budget before national elections to delay a long-promised return to surplus, blaming a stubbornly high Australian dollar and lower commodity prices for a dramatic fall in revenues.

With polls pointing to a solid defeat for Prime Minister Julia Gillard at elections set for Sept. 14, Treasurer Wayne Swan locked in 10 years of funding for landmark disability and schools education policies aimed at reversing its downward trajectory, and committed more money to roads and suburban rail projects.