u/aimixin - originally from r/GenZhou
1-2. Ithink I pretty much answer it here.

3. I think your understanding of socialism is somewhat idealist. You’re not looking at socioeconomic systems as objective stages of social development but as merely abstract concepts which are implemented top-down by governments. We can’t just “decide” what is in the market sector and what is planned, these things are determined by levels of development independent of government policy. Attempts to “decide” this usually lead to economic problems since government policy would directly conflict with material reality.