Earlier quoted context omitted.
I don't think I've ever seen public salaries at places that pay on the lower-end. Usually I've seen it with startups that pay fairly well, but I could be wrong.
Non for profit salaries are public, they aren't paying top salaries usually.
In the US non-profits have to disclose this because the law says so and generally the non-profits do so in the most minimal discrete way possible. Few people, rarely recruiters, know where to go to get the information. This is even a service some background check companies provide.
I think the comment was referring to companies that celebrate the high wages they pay as a way to attract the best talent.