The government does a lot of things that fall into a few categories: tax authority, police powers, market participation for its own activities, and even granting (or reserving) monopoly powers. Also missing from your list: USPS has a monopoly on First-class mail in the United States.

Some of these are just, useful, bad, abhorrent, unnecessary, necessary, or outmoded.

None of that falls into commanding the economy. We’re not even strangers to command economies: the wartime powers of the Federal government are vast, and were most powerfully executed in World War II.

I would argue that exactly what the parent suggested, in respond to the GP falls exactly into that bucket of ideas for commanding the economy. It’s not a just nor good use of Government, no matter how Democratic.