Kramer will probably never get in with the way it's selected. Maybe if he gets considered by the Veterans' Committee he'd have a chance.
If you read Peter King's articles, you generally get the sense that Peter King is choosing who goes to the HOF or not. It's a group of 32 writers - one from each NFL city - and then a bunch of other writers, many of which are Peter King's pals. Jason Whitlock wrote a couple of great articles about how messed-up the system is, and while I don't agree with his HOF choices, I do agree with his general idea, and especially his calling out of Peter King.
Some of the HOF choices are extremely questionable. Joe Namath in particular, who got into the HOF because of his "guarantee." Like Whitlock said in his article, the HOF wants to be able to tell stories with its inductees, so it's got to get a guy like Richard Dent in so they can tell the story of the '85 Bears, or John Stallworth in so they can tell the story of Super Bowl XIV. Those are a couple of guys known for one big game in their careers.