> At the very least, I can get a bunch of people and bang on their doors with some pitchforks.

For that, you gotta hear about the issue first. Local reporting is all but dead, and the few local journalists that remain and have the expertise and time to do investigative pieces on local money wastes are way more easily silenced by SLAPP lawsuits and political pressure (up to and including death threats) than something like, say, the New York Times.