The lectus, or couch, was an all-purpose piece of furniture. Usually made of wood with bronze adornments, the open bottom was crisscrossed with leather straps, which supported stuffed cushions. Different sizes and shapes of lecti were used for sleeping, conversing, and dining.
So pictures of a Roman on a couch eating were not necessarily representing Caesar in luxury, but depict a way of life for many well to do Romans of the day.