Like you, I see research as the No. 1 priority. If the breakthrough could be found that puts an end to this disease, ALL the other funding needs would become irrelevant. Not overnight, of course. Even if a 100% effective cure were found, it would presumably be many years before everyone who needed/wanted it could be treated. But at that point, further fundraising needs would vanish.
Am I talking science fiction or fantasy here? I don't know. But I believe it has to be the aspiration.
I don't even know whether there's a mechanism for donors to specify they want their gift to go exclusively to research. And that puts me off donating, at the moment. I feel I would rather choose a research project that particularly interests me, and support that, directly. But I've no idea which one to choose, or how to donate.
That's why it would be great if MSS had a tick-box to say you want to donate specifically to research, and distributed it to the most promising candidates. If this is already the case, I'm not aware of it. I see only invitations to donate to the MS Society in general, and nothing about being able to support a particular aspect of work.