Alas, I think you are aiming too high. If every politician believed that all basic research had positive net expected-value, that would naturally benefit research of the type that MIRI thinks should be conducted.
Once that is the case, movement towards MIRI as a research grant recipient might be worth the effort of Joe Citizen. Until then, I'm skeptical that advocating for MIRI specifically is likely to be worth the effort, politically.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.