Good post. I would add a notion of idea pervasiveness in the public consciousness. What I mean is how often people think along EA-consistent lines, or make arguments around dinner tables that explicitly or implicitly draw upon EA principles. This will influence how EA-consistent government policy is. Ideas like democracy, impartial justice, and freedom of religion, have strong pervasiveness. You could measure it by surveying people about whether they have heard of EA, and if so, whether they would refer to it in casual conversations, or whether they think it would influence their actions. You could benchmark the responses by asking the same questions about democracy or some other ubiquitous idea.
I like this line of thinking! I’ll be entering civil service for my next career move, and being new to the EA community had got me thinking along these lines—I’ve been asking myself ‘how can synergies be created at these intersections?’.