I've suggested a similar account before and @tarazkp has done so before myself.
And I did some time ago in "My STEEM Vision.". :)
The committee should have enough SP (delegated from Steemit, Inc.) and should be elected regularly by the community, so that there is some control over what it is doing.
Such a committee would be the answer to your arguments/questions (What to do against profit maximizers?) above.