The purpose of this report is to explore why social and environmental sustainability initiatives designed to incentivise garment producers by presenting win-win business cases have not scaled up to make widespread impact. The production of this report entailed interviewing representatives from garment brands and retailers, producers, and programme implementers. Based on these interviews and reviewing documentary records, this report scrutinises the design of business case sustainability initiatives, considers various scaling challenges, and presents recommendations to help scale these initiatives as well as to make greater impact on sustainability in the global garment industry.