[MITSardine]

You'd have to break this down into "archetypes" because like 90% of what you pay for is specific: - retirement - healthcare: negligible expense for most young people (for instance, about 80% goes to the 65+ in France) - unemployment (a little more universal, with some large variations still)

Then there's everything to do with children (from direct subsidies to public schools or kindergarten slots), education (not everyone goes to university, for instance), and other subsidies that are income-dependent (two common ones in France are rent subsidy and a salary top-up for low-but-not-too-low incomes).

Plus, ultimately, 100% of what comes in goes out (modulo administrative costs) at the global scale, so you can't just average this or everywhere looks the same.