The big accounts control it to a degree, and they obviously have a lot of influence. As you say (and I agree) this may be the fairest way. But there is a lot of influence cumulatively in the smaller accounts too. If you look at the SPL proposal, the largest vote group by far is "others" and in the core proposal "others" is the second largest. SPL would definitely not be funded without a lot of smaller accounts building up that "others" slice.