This article challenges the OECD’s dominant downstream-centric framework on plastic pollution by drawing on long-term ethnographic fieldwork in India, Indonesia and the Philippines. While OECD policies emphasize mismanaged waste and littering in low- and middle-income countries as primary causes of plastic leakage, the authors argue this perspective obscures the structural role of upstream plastic production, driven largely by petrochemical interests in the Global North. Through field data, the article reveals how “leaky” infrastructures – such as incineration plants in India, public–private waste partnerships in Indonesia and grassroots upcycling in the Philippines – fail to contain plastic waste, often exacerbating pollution and exposing communities to toxic emissions and microplastics. The study introduces a conceptual framework of “material and structural leakiness,” emphasizing how plastics and the infrastructures designed to manage them are inherently porous. It critiques the notion of shared responsibility, highlighting how it disproportionately burdens marginalized communities. The authors call for a paradigm shift away from recycling and clean-up as core solutions, advocating instead for upstream interventions like production caps and chemical regulation. The article underscores that without legally binding global commitments to reduce virgin plastic production, the toxic burden of plastic pollution will continue to fall on the most vulnerable populations.