Given the contradiction between the current demands for sustainability and the way that the financial system works, this paper explored in a retrospective and a prospective view, Romanian Public Finance Sustainability, highlighting the major challenges and vulnerabilities. Relating to the retrospective part, we concentrated mainly on empirical tests on Romanian government solvency between the period 1990–2020, by applying un it root and co-integration tests. To gain a better, general understanding of the behavior of policy-makers, in the second part we used a scenario analysis of budgetary adjustment in the short and medium run under alternative hypotheses. The results provided formal proof that policy makers decisions face critical and complex questions, and the way in which they manage fiscal stimuli has a direct implication on the sustainability of the country and on the lax implementation of fiscal policy.