Schemes proposing to pay with difficulty / hashpower to change block size should be avoided. The miners incentive has always been fairly straightforward - it is rational to deploy new hashpower as soon as you can get it online. Introducing the concepts of (a) requiring out-of-band collusion to change block size and/or (b) requiring miners to have idle hashpower on hand to change block size are both unrealistic and potentially corrosive. That potentially makes the block size - and therefore fee market - too close, too sensitive to the wild vagaries of the mining chip market.
Pay-to-future-miner has neutral, forward looking incentives worth researching.
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