What two things did the emperors spend too much tax money on?

The emperors often spent excessive tax money on lavish public works, such as grandiOSe buildings and monuments, which were intended to showcase their power and prestige. Additionally, they allocated significant funds towards maintaining large, extravagant armies that were used to expand and defend their territories, often leading to financial strain on the empire. These expenditures frequently contributed to economic instability and dissatisfaction among the populace.