The proletariat in Revolutionary France had very little empathy for the aristocracy.
Well, this is true, But then, it was reciprocal.
Also true. In a world of absolutes where neither party had any empathy for the other, the more perfect society is the one in which the proletariat are happy, simply because there are more of them. A thousand happy workers with no empathy for the unhappy Monseigneur constitutes more total happiness than a happy Monseigneur and a thousand unhappy workers. The Monseigneur's happiness is not worth more than that of a single worker.
Your proposed perfect society up there stipulates universal empathy.
I contest that. Universal empathy may lead to a society with universal happiness, but society does not aim for universal happiness, because universal happiness is likely impossible. Rather, when faced with multiple scenarios in which various people may be at various levels of happiness, a society should aim for the one which makes the most people most happy. If torturing the Monseigneur makes the whole crowd happy for the rest of their life, then I volunteer to be that man.
"2. Empathy means that when others are happy, I am happy. This drives donations to charities, consoling people, and not knifing people for their pocket change which I can spend on donuts."
Reconcile that with forcing people to be unhappy to pay for your happiness.
Again, empathy is not universal. I have more empathy for family and friends than some random guy, and more for aforementioned random guy than for the random guy who makes a fortune by forcing child labor on cheap shoes. In fact, empathy is largely malleable; the audience tends to empathize with the protagonist of a story even when the protagonist is a criminal. Conversely, the audience scorns he who is portrayed in a negative light. The audience sometimes even cheers for the torturing of an oppressive dictator, etc.
So assuming I live in a cardboard box, I probably couldn't give two shits about Bill Gates' 20 billion extorted loss if that loss gets me an apartment and some Cabernet Sauvignon.
Oh boy, France is quite the hot topic society wise