From my vantage point in the US, it does seem like a significant number of young people do want change. I'm basing this on the contrast between Bernie Sanders supporters, largely young people, and Hillary Clinton supporters, who have a lot less young people than Bernie supporters. As for what change young people want today, I'd say it's what Bernie is campaigning for, which does include health care but also free college for all, among other things that primarily concern young people.