So the mere fact that one LIVES in a capitalist economy automatically taints any career choice they make? What you're saying is ridiculously glib. Even in a barter economy, people perceive things through "capitalist gradients" and weigh those gradients against perceived personal satisfaction. None of this has anything to do with capitalism. It's all just a part of the process people consider when they decide what they want to do with their lives.
...so many model of people making judgments toward their subjectively defined ends has ZERO BASIS in reality? Pure hyperbole. Of course there are constraints, such as asymmetry of information, human nature, etc. But to say that people acting towards their own self interest has no basis in real life is just a ridiculous conclusion. If anything, it is too literal a construction of real life, as opposed to being too fantastic. At least in terms of an economic construct for those seeking to share/sell the fruits of their labor, homo economicus is extremely pertinent. And anyway, the whole of Marxism is a sweeping historical generality, so what's the problem with being general?
The bottom line of the Gattungswesen argument is that, even if people are "alienated" by work, it's not all they do. The worker who is alienated in the factory may come home and engage in free labor on his paint canvas or his garden or whatever. Life presents many forms of self-fulfilling activity. Marx presupposes that everyone defines themselves in their work. To the extent that you want to be happy at your chosen profession, that may be somewhat true. But again, the inability to find fulfilling work for those capable of otherwise doing such work is poverty. Hence the social-safety net/redistributive tax system, which realizes that capital is, in some sense fungible, and seeks to promote one of the "virtues" of a capitalist economy - increased competition. Just as people invest in capital, so too does a conscientious democratic government invest in its capitalist citizens to make them ever more prosperous. The fact that people may perceive things through "capitalist gradients" just means that people do what they always did -- look at people who appear to have a lot of stuff and consider whether or not they can see themselves doing the same.
It does, but if you'd like to stop talking about it, that's fine.
You're dodging the question. If all (allegedly) Marxist societies have thus far been improperly constructed, then give me a proper formulation. If you know what was wrong with those societies, then you have a basis for comparison with what is right...at least theoretically. So let's hear it.
1. Barter economy and capitalist economy are not even remotely comparable here. Barter refers to a system of immediate exchange, not to a mode of social organization and cultural logic. Barter is a method of good exchange, and does not permeate the entire fabric of society in the way that capitalism does. There's a fundamental difference in the way that labor is conceived of in Barter and in capitalism, that being: in Barter, you don't have to really ask the questions that I posed above because your options for continued subsistence are much greater than in capitalism. More over, barter does not have the affective and personal dimension that capitalism has, because the mode of exchange is more about your goods than your labor and labor time. Developing your skill-set based on the questions I posed is not something that is just separate from you, but affects everything about your life in a way that barter doesn't even come close to. If you can't understand this, I don't know what to tell you. I've explained it time and time again.
2. Let's do this in reverse:
"the inability to find fulfilling work for those capable of otherwise doing such work is poverty. Hence the social-safety net/redistributive tax system, which realizes that capital is, in some sense fungible, and seeks to promote one of the "virtues" of a capitalist economy - increased competition. Just as people invest in capital, so too does a conscientious democratic government invest in its capitalist citizens to make them ever more prosperous."
You're conflating one definition of poverty (The state of being inferior in quality or insufficient in amount; qualitative) with another definition (The state of being extremely poor; quantitative) to make a point which has nothing to do with alienation or species-being. And an incoherent one at that.
The Homo economicus point: The fact that you named those exceptions makes my point. You cannot make such a generalization about life and the humans within it based on rational choice when your exceptions invalidate (not "force the researcher to modify," invalidate) the whole model. When you're talking about rational choice and humans making the best decision for their highest-possible well-being, you cannot create a theory based on that when it is either invalidated by whole societies, by the mere introduction of variables, examples within Western society from the last half-decade, or has to be stretched to such an extent as to make the theory into something completely different. Marxism doesn't have this problem. It's gone through modifications, but at the core Marxisms are related to Marx's theories, modified by observations and new theories, and when they are modified too much, they become something else entirely.
3. If you can't see the difference between the crises you mentioned and the economic problems of the Southern Cone, specifically relating to the latter's capitalist roots, I don't know what to tell you. There's no need to discuss the point.
4. I'm not answering the question because 1. It's irrelevant, 2. I don't have a personal conception of pure Marxism because I'm not a Marxist (I believe I said that I'm more of an Anarchist who takes many ideas from Marxism), and 3. I basically already answered the question. Marx outlined what his conception of socialism/communism was many times in many texts, specifically addressed in his critique of the Gotha Programme (against conceptions of socialism related to the existing Prussian state), The Civil War in France (in relation to the Paris Commune; loved what they did, wanted them to take and use the state), The Communist Manifesto (self-explanatory), against Mikhail Bakunin, and in fragments in many other texts. If you've read Marx, there shouldn't be any need to ask this question, because it's already there for you.
But you're not going to be convinced by this wall of text, so whatever. I've made my point over and over again. You're the one who disingenuously keeps trying to shift the argument to irrelevant territory. I have other things to do.