Roman satirist and poet Juvenal was displaying contempt for a degraded Roman citizenry that had shunned civic responsibility, shirked their duties of citizenship within a republic, and had chosen to sell their votes to feckless politicians for assurances of bread and circuses. Rather than govern according to noble principles based upon reason, striving for public policies that led to long term sustainability and benefitting the majority of citizens, politicians chose superficial displays and appeasing the masses utilizing the lowest common denominator of "free" food and bountiful spectacles, pageants, and ceremonies in order to retain power.
The Roman Empire's decline stretched across centuries as the gradual loss of civic virtue among its citizenry allowed demagogues to gain power and barbarians to eventually overrun the weakened empire. While the peasants were distracted with shallow exhibitions of palliative pleasures, those in power were debasing the currency, enriching themselves, and living pampered lives of luxury. The Roman leaders bought public approval and support, not through exemplary public service, but through diversion, distraction, and the satisfaction of base immediate needs and desires of the populace. Satisfying the crude motivations of the ignorant peasants (cheap food and entertainment) is how Roman politicians bought votes and retained power.