I guess I would question the value of that, if the fundamentals are such that any such programs and choices have so little effect.
Japan is highly centralized and yet what is so different about the depopulation situation there? It has been widely reported and actually there have been many links posted on HN about it.
The article seems to be making a big deal out of a minor factor, in order to sell a narrative about state centralization saving countries that have adopted it (the Economist is a UK periodical, and the UK was one of the latecomers to centralization). The USA, which is more like the UK used to be, serves as a kind of foil or cautionary example. Note the final sentence, warning us that decentralization leads to Trumpism.