One of the limitations of the "national system" within a world ruled by a transnational capitalist class is that when you have something like a general strike in a country like Greece, it affects only the Greeks, whereas a general strike across all of Europe or the world could bring the owning class to its knees... Spreading unrest in Paris? It's a matter for the French. Spreading unrest in Paris? It's a matter for the French. College professors in Ontario? I don't live there.
(thanks to The Fall Of Humanity for ideas...)