Which entity has the authority to appropriate funds for federal government expenditure?

The appropriate entity for appropriating funds for federal government expenditure is Congress. This is because Congress is comprised of two chambers: the House of Representatives and the Senate, and it holds the constitutional power to manage federal budgetary decisions, including the allocation of funds.

The appropriations process begins in the House of Representatives, as all revenue-raising bills must originate there, and the House plays a key role in formulating budget priorities. However, both chambers must ultimately approve any appropriations bill before it can become law, thus reinforcing Congress's role as the overarching legislative body responsible for managing federal expenditures.

While the Senate and the House of Representatives each have their specific roles in the appropriations process, it is Congress as a whole that possesses the ultimate authority to appropriate funds. The Department of Treasury, on the other hand, is responsible for implementing these appropriations and managing the federal government's finances but does not possess the authority to allocate funds.