Why not charge more for whatever they sell?
They are: a lot more. That's part of the problem. The coffee prices were always high and have moved somewhat higher. But the price for everything else has almost doubled and the sizes have been reduced by probably 25% or more. The quality of the food items is also not what it once was. Two medium coffees + 5 breakfast items + tax is getting north of $30, close to what a sit-down breakfast would be at a diner. McDonald's has the same problem or even worse with a "value meal" > $11.00 with tax near where I live for crappy food.