> That is the problem with free markets

> In a centrally planned economy all supply chains would be stored in one large database and it would be easy to identify all essential supply chains.

Not really, because the real supply chain in centrally planned economies is black market.

So maybe rather than centrally planned economies, we should have centrally observed economies.

But the long queues in front of the grocery stores would be terrible for containing the propagation the virus.

With centrally planned errands one could avoid all queues

Instead going to the grocery store, you report to the central planer what you need. It then creates an errand plan, when you should leave your apartment, when to arrive at the grocery store and when you have to leave the grocery store. Thereby making sure that not too many people are at the store during the same interval.