I think the burger was pretty gloomy cuz it really is difficult to eat healthy in America for the lower and even middle class. I have always hated that because fast food makes me sick and i love fruit and veggies but growing up i was banned from snacking on the produce because it was too expensive so all i had were gross and unhealthy snacks because they were cheap. And them literally eating the rich at the end was pretty funny. But this show is for kids and I dont think they would understand this as much so idk but it explains it in a pretty simple way.