Poverty makes people fat ONLY when there is an industrialised food infrastructure set up in an area which is usually ushered in by developed Western countries. In those places, there is the means for producing a lot of cheap unhealthy calorific food for ignorant people(usually of poor socioeconomic status) to consume mindlessly while being gullibly fed advertisements to overconsume said foods until they descend into obesity and disease. In places without that infrastructure at all, as in some seriously underdeveloped, 'relatively untouched by Western influence' places in Sub-saharan Africa and South Asia, poor people have no choice but to starve(sometimes to death if without aid).