The Queen employs a little person who is 30 feet tall. This person is thrilled to have a man at court even smaller than he is and delights in torturing Gulliver. As always in this novel, no character's actions go without symbolic significance. Here, height seems to be an indication of social and intellectual power. So, when the dwarf, a weak man in Brobdingnagian hierarchy, finds an even weaker man, he's thrilled with the chance to torment him.