Bong Joon-Ho has directed "Parasite," a comedy about an elaborate con that glistens with irony. The material ambitions of the poor are pitted against the dull indulgence of the wealthy in a manichean fight for supremacy. Will the world one day see an all-out war between the classes? Occupy Wall Street, the Yellow Vest movement, were those harbingers? They’ve all come and gone but what’s next? Will there be something else