Do you have a source on that? It is easy to underestimate just how _stupidly_ a non-free society can behave. I'm not even talking democracy vs other (there can be non-free democracies, or notionally authoritarian regimes that are quite free in practice), I mean the really basic "if you can work to better yourself, then go for it" style liberty.
The system of corporations we have today is a super-civilised way of wresting power and control from existing structures - if you can do something better and cheaper than the company currently in power, you can displace them quickly and with minimum fuss.
The core of that mechanism in the west is if you think a companies management are just clueless you can start your own company and compete. That is a big component of what freedom is - if you think you can do it better you can try to do it better.
Non-free societies would almost certainly disrupt that mechanism as the first thing they did. Given how complicated a modern economy is, I'm not sure they'd be competitive with a free society. The inefficiencies would build up to spectacular levels.