Yes let’s have “5 Year Plans” with centralized control instead of the free market, what could possibly go wrong? If only we had a large country that tried that and failed miserably to see what could go wrong.
We don't have the free market. We've never had the free market. Every economy has always been under some degree of regulation and centralized control simply by virtue of existing within the context of a society and government that enforces laws and levies taxes.
Or, hear me out, we could socialize health care and tax the rich rapists that are currently running the country to end poverty in the richest country in the world.