I don't feel the need to get into a pissing contest over who is doing more. Nor do I think it's particularly helpful to demand everyone live like I do. That being said, if you are curious:

I have taken a 25 or 35% pay cut (40 if the last headhunter is to be believed) so I can work for a non profit and get underprivileged kids a post secondary education, haven't bought sweatshop clothes in a decade etc. I door knock for every election for the party furthest left that can win. I'm Canadian and relatively support my Leftist party's positions but generally write in where possible.

Were I American, I'd be door knocking, volunteering and everything else for every damned primary as that's how we move things.