Why are the tribunes angry at the laborer and the mob?

The tribunes are angry at the laborer and the mob because they believe the public's unrest and demands threaten the stability of the state and undermine their authority. The laborer's complaints and the mob's actions reflect a broader discontent with the ruling class, leading to fears of insurrection. The tribunes, as representatives of the plebeians, feel caught between the needs of the common people and the demands of the elite, leading to frustration and anger towards those they represent.