No, it's not. But payout to miners are way too high in this very first example here. Miners rule the market and shortsellers riding it down - with no end to it.
It's not the POW, it's the high rewards. But totally OT now.
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I agree with that. Ideally the reward to miners would be such that it did not make economic sense to form specialized high capital investment entities if that were somehow possible. Even more would be that other functions of the network (transfer nodes and what could one day be something akin to what TOR calls exit nodes) were rewarded so that there would be a lot of them and they were diverse.
These ships have sailed however. We've got what we've got.