Unravel the foundational relationship between public finance and parliamentary constitutionalism. This definitive work examines the evolution of tax, expenditure, audit, and sovereign borrowing laws across Anglophone parliamentary systems, charting their influence on Commonwealth constitutions relevant to India. It critically analyzes how warfare, welfare states, and central banking shaped modern financial governance, questioning established theories. Essential for Indian students and professionals of law, economics, and public administration, it offers deep insights into fiscal policy, democratic legitimacy, and the constitutional roles of central banks and debt markets.