Doesn't Digg do this, or is it just the fact that high ranking Digg people have more followers who want to "help out"? Giving people more power makes it break

Doesn't Digg do this, or is it just the fact that high ranking Digg people have more followers who want to "help out"? Giving people more power makes it break much quicker. You'll soon see upvotes being sold, etc, etc, etc.