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It seems they have mostly chosen not to although grumpycat is taking some action

While I agree with your views on the lack of control of the reward pool on steemit. This was recognised and explained in detail in the white paper.
And the methods to deal with it.

The crab bucket scenario

The example you chose (that cat) is lining its pocket at the same time as masquerading as the saviour. Taking out $11,000 a day? Take a look at what that account is really doing. Follow the money on steemitworld.
Transparency works.
We need a more open dialogue without fear of retaliation from bad actors. It's difficult but not impossible to fix. As you suggested above. You have my support.
Your solution sounds doable but will need a lot of steempower. Well over a million?

Money can silence anything it seems