There's a lot I agree with about this article in terms of the analysis itself, but I'm amused at the idea that this level of control is a dream of the "the radical left and radical right." The economy / world order we
have requires significant amounts of regulation and control. We fear, for instance, China's disrespect of intellectual property law precisely because respect for intellectual property isn't an emergent artifact of a free market; it requires a complex and well-funded legal system with an equally well-funded enforcement arm. An economy where copyright and patent and trademark and trade secret law are effective may be a "living organism," but it's a manicured lawn with a trimmed hedge, not an old-growth redwood forest. You can prefer its shape and appreciate its beauty, of course, but be sure to ascribe agency appropriately.
And that's the real thing the centrists don't want the radicals to realize - that the center is where it is because of careful pruning and grafting, that in so many things from immigration and work visas to tax policy to trust funds to zoning to policing to military spending to labor law to (as the article mentions) how we deal with the homeless and the destitute, we're not taking a natural or default position in any meaningful sense, we're taking the current position, and working hard to keep things that way. The radicals aren't wrong simply because they are radicals and they demand change, so don't argue simply that their position is infeasible, or you may find that it's not as infeasible as you thought. Argue, if it's true, that their position is morally in the wrong. (And "Your proposals will certainly lead to economic collapse and suffering" is really an argument about feasibility.)
Another world is possible. For those who benefit from the current one, that's a scary thought. It's a thought that's driven countless restorationist or reactionary movements through history, from the Confederates to the Bourbons to Tokugawa to the well-funded fall of communism - but they fight so hard because they know that the other world can actually survive.