It is relevant to the context of this thread in general. Even if Polish consumers are spared the trick of raising prices through fake discounts as the OP mentioned, they still suffer from the same surge in prices that many of the European posters here are complaining about. Nowhere in my post was I calling for price controls.
Where? In that post I shared my own personal strategy for saving money by doing my shopping at a wholesaler instead of an ordinary supermarket. No state intervention required.