But that doesn't hold true in the presence of tail subsidy: Tail subsidy will always continue to enrich the mining industry (and those close to it in the economy) at the expense of everyone else, creating a "winner" that can't be displaced by diffusion.
I don't see how this isn't true for Bitcoin's model as well. This miner "enrichment" seems to be a function of security in $ value.
It doesn't matter whether you get this value from the block reward or from transaction fees. If you end up with a secure PoW system, then you must be enriching miners. As far as I can tell, the only difference is that Bitcoin's plan is to do this only through transaction fees (eventually).