Yes. US and places where people can elect a democracy have a higher chance of some change than European countries with parliamentary systems where a sudden pop

Yes. US and places where people can elect a democracy have a higher chance of some change than European countries with parliamentary systems where a sudden populist candidate won't make it through that system. I'd argue that, even if some change does happen in the US. Most change (see healthcare, military spending, etc) won't happen because big money will beat the majority of the populace every time.