You are 100% right about Switzerland (but its so far ahead that adjustments would not matter too much), for the others its probably barely double digit percentage adjustments.
My personal experience is that German supermarkets are priced extremely competitive (Lidl/Aldi specifically), and Italy felt more expensive by comparison to me (except maybe for local produce and cheese).
Comparing after-tax pay instead would help the US pull ahead for sure, but I feel a bit mixed about that because those taxes pay for stuff like child- and healthcare, which in the US is probably significantly more expensive out-of-pocket than the median EU citizens pays in taxes for the same.
My personal experience is that German supermarkets are priced extremely competitive (Lidl/Aldi specifically), and Italy felt more expensive by comparison to me (except maybe for local produce and cheese).
Comparing after-tax pay instead would help the US pull ahead for sure, but I feel a bit mixed about that because those taxes pay for stuff like child- and healthcare, which in the US is probably significantly more expensive out-of-pocket than the median EU citizens pays in taxes for the same.