But with more initial karma points, the high-karma user's post would appear before the new user's, giving it a visibility bonus in exchange for the extra karma

But with more initial karma points, the high-karma user's post would appear before the new user's, giving it a visibility bonus in exchange for the extra karma cost. Seems like a worthwhile trade for high-karma users, though it would skew the most visible content towards that of high-karma users and raise the barrier to entry for new users, for better or worse.