comment: So, the time to develop the product would be N*2. That is a halving of the speed of development.
  
  This isn't actually how development time usually scales, but even if it were, the problem is why are any of these people developing anything? Are they being paid? By whom? And why? What are the peoples motivations? It's very easy to imagine 50 highly motivated people working faster than 100 unmotivated people. You can come up with all manner of critique of capitalism if you want, but we can at least describe the motivation as those people are competing for profits. You talk about "halving the speed of development", but halving only makes sense if you're comparing the system to something else. But what are you comparing it to and how do you account for those hypothetical workers' productivity?