Journalists recently been visualizing salary data in Tableau Public. The Tahoe Daily Tribune did a well-designed salary explorer.
Brent Barron at the Public Policy & Governance Review visualized all public salaries in Ontario:
And Dan Catchpole at the Snovalley Star visualized Sherrif's Deputy pay:
The compensation of most public officials is a matter of public record. However, like most data, it's hard to get meaning from it until you can explore it visually.