Come on, be honest, this has happened to you, right? You're all fired up after a meeting because you've come up with the perfect strategy to help your department - and maybe the whole organization - move forward in a big way. You write it up, deliver it to your boss, and...nothing happens. Your boss doesn't think it's so great and is so focused on other things she won't really tell you why. Or she tells you to work it out with an underling, who shows no interest in helping "you" succeed. Maybe she brought it up at a meeting and it got shot down by one of her peers. Maybe she switched jobs, and the new gal isn't so interested in ideas from the "old regime".
It's sad how many great, thoughtful ideas for change end up D.O.A. like this, but this is kind of the way of life inside many institutions isn't it?