My guess would be that the bread is the finished product, which required expensive machines and man-hours to produce, which accounts for a lot (most?) of the price of bread. The cost of the raw materials put into the bread is probably(??) a low percentage of the total cost.
I looked into subsidies for bread makers. I didn’t find anything. But I DID find articles on how much the government subsidizes wheat and other crops and produce. No wonder the raw materials are increasing in price - the government is involved!