The issue is also self fulfilling... Those with higher karma will get more and more, those with less will to some extent be ignored. How to encourage new users

The issue is also self fulfilling... Those with higher karma will get more and more, those with less will to some extent be ignored. How to encourage new users when there chances of increasing their karma are decreased, since their comments appear lower. Surely it's best to encourage new users to comment, rather than to post off topic / repost material? And surely this dissuades commenting?