Well, in addition to the current algorithmically generated pages (where the algorithm highly values new posts and can be gamed by bots), social sites could do more to help users maintain & publish high-quality material. The high-quality stuff would be more static since more effort is required to generate it, and others could view it through user profiles or a follow/subscribe mechanism.

I think YouTube does this to a large extent. They use algorithms to help discovery but users can easily click on a channel and view all of a creator's high-quality material. But YouTube is video-only..