Yes - there are different ways I could see it work, but right now, effectively, the amount of money you contribute determines the number of votes you have on ANY action of the endowment. Anyone within the DAO or not can submit investment proposals to the DAO to vote on.

Of course, 51% attacks become possible with anything decentralized, so there are provisions to split the endowment itself or pull out your share of the funds whenever you desire (another benefit vs existing charities and endowments).

Check out Stephan Tual on Medium for more info on how his DAO supporting the Ethereum ecosystem awards votes to token-holders and incorporates 51% attack protections (https://medium.com/@stephantual).

I'd be interested in ways to non-linearly scale votes with donations (such as quadratic voting: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2003531) but that would require some sort of decentralized identity to prevent dupe accounts.