I have seen a combination of both Shrink and Price increases. The cost of eating lunch at my favorite restaurants has steadily increased, and the Average price per unit for normal groceries has increased on a weekly basis. Even if your bill remains the same, that 32oz Ketchup is now probably 28oz
Looking at some commodity index's Beef is about 2x the price it was in 2009, Bananas are about 40% higher than 2009, Milk over 2x higher than it was in 2009.
So I really do not understand what data you are looking at that shows food prices are not going up? Both Empirically and Anecdotally my food costs are increasing
[0]: https://www.in2013dollars.com/Beef-and-veal/price-inflation/...
[1]: https://www.in2013dollars.com/Bananas/price-inflation/2009-t...
[2]: https://www.in2013dollars.com/Milk/price-inflation/2009-to-2...