Chapter 7 shows readers the Marquis in a scene that should be appear as a wood carving in a book of fairy tales, being that it is such a cariacture of the rich. The Marquis is being feed chocolate by four people, reveling in his position, and laughingly disregarding all who are below his rank and economic class.
The main idea in this chapter is the decadence and callousness of the French nobility. Dickens was writing at time when the gap between the classes in France was large and growing, and there was much unrest. By portraying these characters of nobility as extremely as he does, Dickens is clearly criticizing the behavior of the upper class.