Battle Royal is a testament to the seven deadly sins. We recognize those to be wrath, greed, sloth, pride, lust, envy, and gluttony. In striving for equality, it seems that we feel those sins will be lost. That is not true. They are sometimes simply magnified.
The young man allowed his pride to fuel the envy and wrath of his colleagues. The fighters' greed and gluttony allowed them to use the lust and sloth of the town leaders to try to achieve riches. In the end, no one was successful.
The prize that the narrator gained was merely window dressing for participating in the debauchery of the evening. There was no triumph because evil had still prevailed. The only equality that had been achieved was to be unfaithful to himself and lower his standards to those who had chosen to try to raise themselves up by stepping on other human beings.