And GDP is not hard to game if you're centrally planning the economy. And even that excludes simply lying about your figures.
But did they game GDP?
Your insinuation seems to predict that there was a dramatic drop after the fall of communism. It did fall by half, but that just brought it back to levels reported in 1985. Some communist countries, such as Poland and Hungary, barely had any dip.
Russia continued to tumble, which is consistent with what was going on. If you trust western GDP figures, the most skeptical position I can imagine is taking the 1997 figures as a proxy for the 1985 figures, and concluding a 1.5x fudging. Which is not much for taw's purposes.




There are several points here. What I endorse is what I took to be TAW's original point: people laugh at these stories and reinforce basically false beliefs about Soviet efficiency. The stories about tiny nails are true, but they are not representative. For these purposes, it is irrelevant if the goal of the efficiency was military production. The work camps are relevant if that is how they achieved efficiency, but I don't think that's a popular belief.
Also, people compiling GDP, like the CIA, try not to count worthless goods. They also compiled civilian consumption, if you'd like to try to exclude military spending, but I don't know where the data is.
I'm not sure I endorse the use of GDP for general success of society. It is very convenient to talk about relative changes in GDP, though. No one is claiming that the USSR was a rich society, only that its GDP was multiplied by a reasonable number over the course of the century. But I am claiming that it didn't suffer mass starvation after Stalin.