Not how politics works! He puts zero effort into making them passable, or pushing to get them included into omnibuses. He’s there to placate and sell books. If what you want is an influencer in the Senate, he’s your guy.
isn't a method used by smaller groups with less popular ideas to try to shift the overton window in their favor? if that's the case with Sanders then his goal wouldn't be to make his bills passable, it would be to shift the conversation to something like "hey maybe a sovereign wealth fund isn't a bad idea"