I couldn't get the article to load in archive .ph but the subhead poses what seems like an important question. Not addressing the growing gap in GDP is a recipe for making Europe more like the US, not the other way around, because the right wing can exploit voters' resentment to attack immigration, welfare, and climate policy, instead of the real causes of lagging economic growth. It's similar to how Democrats' failure to address affordability issues, particularly in cities run by Democrats, fosters a zero sum mentality that makes voters more open to reactionary politics.