What’s the difference between a Marxist-Socialist and a Keynesian economist?

Several things, including but not limited to the following: The Marxist-Socialist believes that workers should own the means of production, whereas Keynesians support the private ownership over the means of production. Marxist-Socialists believe that centralized government would ultimately wither away after a revolution, whereas Keynesians advocate greater government action to ensure full societal employment. Finally, a Marxist-Socialist would not be invited to a party that a Keynesian was throwing at work because the Keynesian knows that the Marxist-Socialist would throw a stink about the way the cubicles in the Keynesian’s office were arranged.