That’s a pretty important caveat. I would take it one step further to say that it only matters in non-communist governments. Yes, maybe China can pull it off. But even losing a large chunk of 40% of the economy will be pretty bad and they’d have to switch to something pretty close to fully communist pretty quick to pick up the slack.
Which is the plan anyway, especially after the failure of allowing privatized luxury housing development.
But more importantly, a country that doesn’t privatize any of the essentials has nothing to fear from the collapse of private markets; everyone will still be housed, fed, and cared for.
Basic utilities like electricity is privatized in most of the US. Are we cooked when inevitable degrowth occurs?