What Is The Conflict Between The Tribunes Flavius And Marullus And The Commoners?

What Is The Conflict Between The Tribunes Flavius And Marullus And The Commoners? Flavius and Marullus, Roman tribunes (members of the government), are upset that the Commoners do not care that Pompey is dead and Caesar is taking control of Rome. Why are Marullus and Flavius upset about the commoners not being at work? Why