Why are price adjustments, namely increases, "hidden" in the Migros Cooperative and passed on to the Cooperative members, i.e. customers, making even sustainability null and void?

Example; bakery products at the end of 2023, new packaging, all in light blue. I noticed this explicitly with gingerbread spice. Price went up, as on all products, content remained the same, but the pack was simply enlarged. Is that still possible? Why, in these times of sustainability, are we producing ever larger packs with less and less content, just because the sales strategy implements this ominous psychological trick, is almost unbearable in my consumer world.