If financial development facilitates economic development at the international level, as is the consensus view, then it follows that each government’s task is to implement policies that effectively boost national financial development. This study tests the new hypothesis that a more fiscally solvent policy approach positively influences financial development. The results, based on a yearly comparison, show that fiscal solvency, approximated by the credit rating on sovereign debt denominated in local currency, affects three dimensions of financial development: (i) the depth of credit leveraging of economic activity; (ii) the efficiency of the bank lending-deposit spread; and (iii) retail access through bank branches and automatic teller machines (ATMs). The test confirms that there is one tool upon whose importance not all macroeconomic policymakers have agreed in their strategic planning for enhanced general public welfare: fiscal solvency.