Except the young people didn't actually turn out for Bernie in the primaries. Corbyn I will concede managed to harness the young vote amazingly, but Bernie didn't actually manage to do so.
Charisma helps, but from what I remember working for the campaign, canvassing college students was literally the most frustrating kind of canvassing. Most of the time the student was perfectly capable of voting, but simply did not give a shit at all about politics. With any other kind of potential voter I could ask them what policy issues mattered most to them and they could give me an answer that I could work with, but the college students would usually not even have an answer. They literally didn't have an answer to a simple question like "What policy issues matter most to you?"
I literally had more success finding democratic supporters canvassing door to door in rural areas than canvassing in college areas.
More young primary votes were cast for Bernie than for Hillary and Trump combined. Given the universally low turnout of primary elections, this is a pretty big deal.
The far left and ideologue libertarians both make the same fundamental mistake regarding people: They vastly overestimate their capacity for decency/rationality. Direct Democracy is worst Democracy for a reason.
Direct democracy is great as long as you can find some way to contain the capacity for harm. The only times direct democracy is harmful is when it allows for the reentrenchment of other hierarchical systems (be them economic, racial, or sexual), thus enabling a reactionary agenda. What we ought to do is find a way to democratize politics as much as possible while also protecting the well-being of vulnerable populations. This allows for far greater participation within our political system and ensures that policy serves the greatest number of people.
Full-on socialism is a great way to do this, but that's not remotely possible in our current political climate. But creating grassroots democratic institutions, particularly in underprivileged communities, can help us get there.