Steemit, Inc. should only delegate the SP, but of course not influence the decisions of the elected committee (elected by the community, not by Steemit, Inc.).
Of course that should be made clear before, otherwise it wouldn't make sense.
Also the criteria of how to elect the committee needed much fine tuning. One could for example think about conditions like that every voter should be on STEEM for at least some weeks and had published some posts to prevent multi account voting. All that wouldn't be easy at all but worth a try ...
I just don't think that's possible. I am unable to recall an example of folks providing funding without having influence on how it's spent, other than taxpayers, and that's because we're just extorted.
Nevertheless, that would be my suggestion (Steemit, Inc. contributes only the SP, and the community elects an independant committee).
If Steemit, Inc. would agree to doing that, is another question of course ... :)