It has been suggested that national economic policies should focus on taxation to achieve social equity and interest rates for economic efficiency; wealth distribution can balance efficiency and equity through tax rates, interest rates, and exchange rates. Additionally, while the economic system seeks efficiency and the social system pursues equity, common interest modifications with elastic exchange and tax rates should be applied for balancing efficiency and equity. Wealth Expanding Theory Under the Principle of Efficiency-Equity Equilibrium is a comprehensive reference source that considers economic philosophy for extending economic cognition, balancing economic efficiency and social equity, and future interstellar economics. Covering key topics such as poverty, fiscal policy, and macroeconomics, this reference work is ideal for policymakers, government officials, business owners, economists, managers, researchers, scholars, academicians, practitioners, instructors, and students.