Which government is primarily responsible for implementing fiscal policy at the national level?

The Commonwealth Government is primarily responsible for implementing fiscal policy at the national level because it has the authority to make decisions regarding national taxation and government spending. Fiscal policy involves the use of government expenditure and revenue collection to influence the economy's overall activity. This national level authority allows the Commonwealth Government to enact policies that can stabilize the economy, promote growth, and address issues like unemployment and inflation.

State Governments, while they do have financial responsibilities, primarily deal with issues and policies relevant to their own jurisdictions, such as education and health services, rather than overarching national fiscal policy. Local Governments also focus on local issues and management, not on national economic strategy. Regional Governments can exist in specific contexts but do not typically hold formal authority over national fiscal matters. Thus, the Commonwealth Government is the main player in shaping and implementing fiscal policy at the national level.