I don't know (when "they" erode the benefits) if it is actually that "they think you don't notice" as much as they have informal meeting where no one who is or has ever been a field service person is included to give the side of the conversation from their/our view point.
I don't think it is a particular manufacturer's direct problem though, it is more the nature of industries where very highly trained and specialized technicians are not in the office, and are 'represented' in office/management discussions by people who never have done the job, or who decided long ago that they did not want to do that job, for what ever reason.