I honestly do that. If I have an idea that I know will be near-impossible to get through the internal politics and that likely nobody will really care about (like the saving 50k example), I put the idea on my CV as if I actually implemented it. I get asked about it at interviews and just fantasize about what would have happened had I done it. People tend to be mighty impressed. I tend to choose under-the-radar things that my boss wouldn't necessarily know about.