...and not to mention everything is interconnected in an economy. If food prices rise by x%, there is a cascade effect on the prices of everything, not just groceries.
It frequently goes the other way. If people are spending more on food that lowers the demand for services which thus lowers those services costs. Housing for example is limited by people’s ability to pay for it, with clear long term trends showing an inverse relationship between housing costs and food costs.
PS: In the short term inflation and deflation can be caused by a huge range of effects, but in the long term it’s bound by government spending and taxation.
