All mining pools? What is stopping anyone anywhere in the world from starting their own pools offering better rewards? Miners will be incentivized to switch to the most profitable pool. And that is just the simple hypothetical
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the more mining pools there are the more closer we are to solo mining.
That will come with after hyper deflation. More mining pools just makes it so miners have more options. The weak pools, like the ones that block more profitable transactions, will gradually die out. Unless they receive some form of subsidization....for example the US government could give them dollars so they can buy bitcoin off an exchange to give to their miners. I realize that is not likely but hey a man can dream