I don't think this seems that complicated. Imagine the same amount of work gets done, but we direct efforts towards ensuring basic needs are met first. Hell, say we lose a quarter of the work to inefficiencies and time off for workers. Stop producing most absurdly high end luxury items that 99.9% of society can't enjoy, cut back on producing frivolous shit nobody needs, and accept that having your every conceivable whim catered to for a price may not be feasible, but you'll live in quality conditions. I'm not saying it's the right call, but it's not that complicated. That's not the hard part. The hard part is running an administration for an entire country's economy and keeping the corruption out at that scale. It creates centralized points of failure, which are highly attractive to corrupt individuals.