It is part of the problem, but I think it will be solved largely through SMTs as, would you want me to post a selfie and get 30 STEEM for it? For me at least, I know that I am going to be generally rewarded quite well these days because of what I have developed to this point, so I put time and effort into what I do in order to justify the payout. On an SMT however, I could very well have moer fun content and not have to worry about being over-rewarded for it.