We weren't even discussing surplus value, why workers deserve the proceeds of their labor, only why capitalists do not. It is a rather precarious argument to make, that wealth is not created by labor. Even coordination of reinvestment is a labor of sorts, even it is a rather simple task even a computer program could handle. However, a capitalists need not even make this coordinating gesture, he can hire someone else to do it. The position of the capitalist is one of simple rent, and ownership. It has nothing to do with productivity.
What interesting examples you have chosen to make, the two most isolated countries on earth. Look at China, you can't make a single investment without government approval, and it's the second largest economy in the world, same with the USSR. I'm not sure I'd use these as exemplars of socialism, but they are not warning stories about not enough investment. The situation in North Korea and Cuba has a lot more to do with their access to international markets than domestic policies. Even with it's limitations, Cuba has a much higher life expectancy and literacy rate than the US.
You literally asked "Does any of your books explain this?". I gave you both the book, and the explanation.
On the contrary, Cockshott presents a very different system of planning than the soviet method, specifically with the use of cybernetic systems. He tackles the calculation problem headon. The desired result is not utilized to calculate what should be done with all resources. On the contrary, you can use previous data on consumption and production to predict future consumption and production. You can quantify value by giving people a set number of labor vouchers, and having them spend it on goods whose prices adjust according to the demand until all goods are sold.
Incorrect. Rather, others are forced to labor to produce it. This labor is compensated by other goods produced by society. Hence, society incurs the cost.
That is not what Cockshott wants. You should really read him if you want to understand his argument. Labor vouchers entail just that, that people are paid according to how much they work. There is no wage, in the sense that you know it.
It's forceful and coercive because people can eat and get paid for the work they choose to do? What nonsense. Some freedom you propose, the freedom to starve or die. In that sense, we are always free! I can always choose to just shoot myself and be done with it.