To poor people in the US Nutella on a French Baguette would be a treat.
In the US poor people eat "peanut butter" that is made from some peanuts, and a bunch of hydrogenated palm oil or whatnot. The bread isn't even legally bread by French law, it's some weird thing made in a bread factory not a bakery and its shelf stable for 2 weeks but also not nutritious.
You can walk into a Walmart and get a jar of the cheapest store brand hydrogenated oil peanut butter for $3 or so, and a loaf of the cheapest store brand white bread for $2 or so.
Your luxury French Nutella desert sandwiches would cost closer to $10 for the Nutella and like $3-4 for the baguette
I'm not joking, Nutella is viewed as a real luxury here