Capitalism:  Hey, Socialism.  Remember how you worked your ass off
    trying to make Communism happen?  From each according to ability,
    to each according to need?
  Socialism:  Ahhhh.  Don't remind me.
  Cap:  Check out what I did, as a hobby, after going home from work.
  Soc:  You... bastard.
  Cap:  To each according to need, from each according to how awesome I am.
  Soc:  I hate you.  You are literally the worst.  Most of those
    people aren't even *working*.
  Cap:  I'd love to talk more, but I need to be on Mars soon,
    on a rocket built without taxes.
  Soc:  Yeah, you'd better run!  Jerk.

I doubt that very much considering that most of the western world is in some form of social democracy (Fabian-like socialism). If anything, capitalism is on it's last legs due to the fact it's unable to continue to exist without turning humans into the hover-pod marshmallow people from Wall-E. A species that has to consume everything in sight without any natural check to its growth will inevitably be constrained by the physical limitations of its environment and it's technologies.

Inserting the word "social" into "social democracy" is the greatest propaganda trick socialists have ever pulled. It lets them take credit for an existing, functional system that they want to destroy. It's classic bait and switch.

If anything, "capitalist democracy" is a far more accurate term.