Bruce Bloom who was the former CEO of Cures within Reach was one of the first people to propose using pay for success financing (i.e. social impact bonds) to repurpose generic drugs, although their focus was on rare disease (see https://ssir.org/articles/entry/repurposing_social_impact_bo...). More recently in 2016, Findacure in the UK tried to get NHS backing but this was derailed due to Brexit (see http://findacure.org.uk/the-rare-disease-drug-repurposing-so...). The mission of the charity https://crowdfundedcures.org is to raise awareness and get payer backing of a generic drug repurposing pay for success contract in a specific disease class e.g. Covid-19, pancreatic cancer, Alzheimer's, Crohn's disease, MS, longevity, etc