I'd also be willing to pay all of these amounts but, yes, would obviously expect the quality of the food to increase with each price level...which is very often not the case.
I am also finding myself more willing to spend money on dining out given the inflation on supermarket-bought food. Yesterday, I found myself with an armful of bits for a picada at the wrong end of a half-hour (at least) queue. After tallying the total in my head (just over 100 pesos for 1 meal and beer for 2 with, probably, minimum leftovers), I dumped my stuff and headed out to Las Cabras, where we had a similar quality meal (1 veggie fajitas with chips and salad, 1 grilled chicken with salad, 2 cokes) for 96 pesos. While there, I also noticed a nice-looking place over the road offering a picada + jug of beer for 70-something pesos.
A couple of years ago, I would've got the same picada at the super for about 30/40 pesos. Now I eat in only to have better quality food (pizza, pasta, cakes, soups, curries, etc) than is available at restaurants and not to save money. Unless I've made a reservation or plan to eat somewhere (cocina sunae, for example), I mostly eat out when I'm tired and can't be bothered to slave away at the stove when I could be paying the same price (at a Garbis or Las Cabras-level restaurant) for someone else to do all the work!