Great question so I tried to find the original source -  "Eat the Rich is an abbreviation of a saying attributed to Jean-Jacques Rousseau: "Quand les pauvres n'auront plus rien à manger, ils mangeront les riches!" (When the poor have nothing more to eat, they will eat the rich!)." "Jean-Jacques Rousseau (UK: /ˈruːsoʊ/, US: /ruːˈsoʊ/;[1] French: [ʒɑ̃ʒak ʁuso]; 28 June 1712 – 2 July 1778) was a Genevan philosopher, writer and composer. His political philosophy influenced the progress of the Enlightenment throughout Europe, as well as aspects of the French Revolution and the development of modern political, economic and educational thought."