I read Stephen Pair's proposal and it is basically the Cryptonote adaptive blocksize limit in Monero without the penalty function. It relies only on the probability of orphan blocks to set fees. My take is that this will suffer the same fate as a Cryptonote adaptive blocksize limit without a tail emission, such as is the case in Bytecoin. It will fail once the emission runs out, with the hashrate collapsing and the coin becoming insecure  At best one would see the type of cartel that TPTB_need_war  has suggested; however my take is that this kind of cartel would only last for a short time before collapsing. Just witness what is currently happening in the crude oil market.

Edit: https://medium.com/@spair/a-simple-adaptive-block-size-limit-748f7cbcfb75#.muot131pa