Actually I dont see the loft goals of any of these governmental systems as being the problem so much as the greedy and evil people who twist them to their advantage.
The world has yet to see Communisim practiced in the full manner in which it was intended too be practiced by its creators at all. At least not outside of a few hippe communes, spiritual retreats and within the confines of the pre "church" christian groups where any who joined gave all of what they had to the group so that each could take according to their need.
And ole Vince is spot on if one actually studies economic philosophy at an academic level...my poly sci teacher recomended him too.