Pushing these responsibilities onto individual consumers is not going to work. You're not going to win anybody over by saying "buy a bike and vote to make it more convenient". Instead, the change needs to come from above, and it needs to compel people to switch. Make a bike-only life desirable, or even preferable, then people will choose it. Of course there's a chicken and egg problem, and several financial, and political problems. We need the equivalent of an eco-dictator. And on a global scale. And that would bring its own set of problems of course.