It seems that the proposal from South Korea is different though, because it will show a before-after comparison, which isn't required in Europe. So I don't know for you, but I personally don't remember what's the per kg price of every single product I buy. If it increased and all other products increased too, I will not have any reference point.
It still helps, though, unless the shrinkflation hits the shelves for all competing products at the same time. If one brand starts with a higher per unit price, they will lose some customers comparing the per unit price with other brands.
