You're overfocusing on one single component of a fairly complex system. Government spending, COVID impacts (pent up demand, supply chain disruptions), a massive war in Europe impacting multiple crucial raw materials - they all have a part in the stagnation / borderline recession we're seeing. Anyone claiming it's "simple" or due to one single factor either has an agenda or doesn't understand how complex economics are.
If you've been eating the same for the last 20 years and you've been gradually gaining weight over the last 20 years, then it's your diet.
If you've been eating the same for the last 20 years and you suddenly gain weight, it's likely not your diet, it's something else -- exercise, illness, et cetera.