Income tax, serving as a critical fund source for most world governments, is a universal storyline in over half the world's countries—comprising approximately 80% of all government revenues. Interestingly, there exists a small but significant set of countries that deviate from this storyline; these are the nations which have discarded the system of levying national income taxes from their citizens. These countries, fascinatingly, manage to sustain their economies, usually through nationalized revenue-intensive sectors like oil or tourism or by implementing other types of taxes.
Key findings from the data include: