> have some effect on inflation. But how does this concretely affect supermarkets? They presumably didn't raise wages, they didn't have to pay more for their w

> have some effect on inflation. But how does this concretely affect supermarkets? They presumably didn't raise wages, they didn't have to pay more for their wares(at least not at the level they raised their prices at, after all they have probably long-term contracts at generous oligopoly conditions) and their electricity bill is maybe at most 10% of their cost. This is purely extortion.