Very well-supported argument by the fact that obesity tends to accumulate in the well-off who can afford lots of food, while poor folks tend to be slender. So yeah, clearly lower spending on food would reduce obesity.

Obesity is inversely correlated with income.

https://www.statista.com/statistics/237141/us-obesity-by-ann...

Cheap GLP-1's will probably finally bend this curve for lower incomes. Muscle-mass (via paid meds) will be the new marker of wealth/status for upper incomes.