Why did South Australia hand control of the Northern Territory to the Commonwealth government in 1911?

South Australia handed control of the Northern Territory to the Commonwealth of Australia in 1911 primarily because it had overreached its financial capabilities.1

After acquiring the territory in 1863, South Australia launched ambitious development and settlement plans, including the construction of the Overland Telegraph Line and the Darwin–Pine Creek railway. However, the colonial government struggled to turn a profit in the region. These difficulties were compounded by several factors:123

• Economic Failure: Efforts to develop the territory were hindered by mismanagement, poor site choices for early settlements, and the eventual decline of the gold mining industry by the late 1890s.23
• Industry Decline: The pastoral industry, which formed the basis of the territory's economy, suffered from severe economic depression in the 1890s, high transport costs, and labor shortages.23
• Unambiguous Acknowledgment: The transfer of the territory to the federal government was an explicit acknowledgment of South Australia's failure to successfully develop and sustain the region.1