This painting depicts the government in the 1300's. Times have not changed in that the leader of the government is surrounded by his "servants". This shows how the government not only rules, but they think they can use their slaves in any which way they please.
“And the philosopher holding converse with the divine order, becomes orderly and divine, as far as the nature of man allows; but like every one else, he will suffer from detraction.” (Plato, Book 6). What this quote is saying is that in order for a society to thrive, the leaders have to be orderly and divine. This connects to this artwork because having slaves is not being orderly and divine. It is the complete opposite. Leaders have to be fair, and this is not depicted in this piece of art.