{"id":"GSX:POP-001:A03","local_id":"A03","name":"Public pension lens","statement":"The public model is a pay-as-you-go lens, not a replica of South Africa's current tax and grant system. Working life begins at 20, 80 percent of working-age people contribute, and migration is excluded. Survival to the scenario age is rectangular.","value":"80","unit":"percent contributor coverage","type":"model assumption","provenance":"Manuscript public-system specification","evidence_strength":"model assumption","sensitivity":"high","alternatives":["Fertility of 1.3","Fertility of 2.1","Wage indexation instead of prices"],"href":"https://greyscienx.com/research/population-futures/when-retirement-becomes-impossible/assumptions/A03"}