As I read it, the point of the linked article is not to argue that a specific approach will work, but more to argue about what effects hypothetical policies wou

As I read it, the point of the linked article is not to argue that a specific approach will work, but more to argue about what effects hypothetical policies would have, if successfully enacted, which is a core concern of economics. The argument here asks: if we did X, would Y follow? There appears to be a debate among economists, and this article is making one argument in that debate (which you can agree with or disagree with). But that debate is independent of whether is it possible in practice to do X in the first place.