And I guess having more pools wouldn't help, because they could all still collude and achieve the same result. It would just be harder for a larger set of entities to collude.
But doesn't the prisoner's dilemma work against such collusion?
Does it? If you spend .25BTC every 5 blocks in order to pump the average fee price in the mempool, you mine 1/5 of the blocks, you recapture some of that spend, and ensure that when you do mine a block, you get an extra 2-3BTC in fees. Has someone done a robust modeling of the trade-off for a large miner to engage in this kind of behavior?
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And what if you don't spend extra, will you not get an extra 2-3 BTC in fees because the others did?
Sorry if I'm not making sense, I haven't thought much about it and am just thinking out loud. If there are indeed incentives for collusion, wouldn't this be a long term solution to the security budget issue? They would be incentivized to spend even more for even higher block rewards, but not so much that Bitcoin becomes useless and loses value.
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