What you're describing is more accurately termed majoritarianism (or anti-majoritarianism). Populism refers to something else: specifically, when one party goes

What you're describing is more accurately termed majoritarianism (or anti-majoritarianism). Populism refers to something else: specifically, when one party goes, "we have decided that this policy is the Will of the People, and that is not up for debate or discussion. Because this policy is the Will of the People, anyone opposing it is ipso facto an Enemy of the People and must be destroyed."