Earlier quoted context omitted.
> using modern computing and communication technology, it would be possible to run a complex economy with calculations "in-kind". No, it wouldn't. It's not a matter of the speed of the computing; it's a matter of the number of information channels available. The amount of information that would need to be processed to run a complex economy goes up exponentially with the size of the economy, but the number of informat…
You mean you should let decide to monopolies and oligopolies what products and services we need right? There is no such thing as an ideal free market. Free market is an human model and therefore just an abstraction. The gap between theory and reality makes all the difference in the world.
Sure there is. A free market is a market in which all transactions are voluntary. That's the natural state of a market. We see many markets that are not free only because governments either prevent people from engaging in transactions they would otherwise choose to make, or force people to engage in transactions they would otherwise not choose to make (the obvious example of this is coercive taxation).