Revisiting the Role of Financial Sector Development on Income Inequality

Abstract

This paper examines the intricate relationship between financial sector development and income inequality across 55 countries, encompassing both OECD and developing nations, from 1980 to 2020. Drawing on key theoretical perspectives the inequality widening, inequality narrowing, and inverted U shaped hypotheses the study explores whether financial sector growth leads to more equitable income distribution. Using multiple indicators of financial depth and accessibility, the qualitative analysis employs bivariate scatter plots to assess the dynamics of income inequality and different indicators of financial development. The findings suggest that while financial sector development is generally linked with reduced inequality, this relationship varies significantly while examining with different income groups. In OECD countries, deeper and more accessible financial systems correlate with declining inequality. However, in many developing countries, financial development appears to exacerbate income disparities, likely due to unequal access and institutional weaknesses. After adjusting for outliers, the results indicate a stronger and more consistent inequality narrowing effect of financial sector development. The study highlights the importance of inclusive financial policies, institutional quality, and targeted interventions to ensure that financial progress translates into broad based economic equity.