Is Salary Transparency A Good Thing?

Talking about how much or how little money you make feels taboo, and it shouldn't. Knowledge is power and Glassdoor info is hit or miss. Wouldn't it be great to know what your peers make so you can use that to leverage a raise? Or if your company does a "market adjustment" yet you don't see the data, wouldn't it be great to know how accurate it is or isn't? Would salary transparency help or hurt workplace wellness?