Appius, partly from his innate love of tyranny
Hor Book II Chapter 27: Secession of the Plebs and Fifth Sabine war

Appius Claudius, harsh by nature, and now maddened by the hatred of the plebs on the one hand and the praises of the senate on the other, asserted that these riotous gatherings were not the result of misery but of licence, the plebeians were actuated by wantonness more than by anger.
Hor Book II Chapter 29: Secession of the Plebs (Cont.)