The key idea behind democracy is that if politicians pass good policy, people will reward them with votes. But is that actually true? The political scientist Hunter Rendleman looked at what happened when governors extended a social-welfare benefit that has lifted millions of working-class Americans out of poverty.Share understanding this holiday season. For less than $2 a week, give a yearlong Atlantic subscription to someone special. They’ll get unlimited access to Atlantic journalism, including magazine issues, narrated articles, puzzles, and more. Give today at TheAtlantic.com/podgift. Learn more about your ad choices. Visit megaphone.fm/adchoices