No, there aren't privacy implications. We have checked on that. The intent here with that provision is to allow an individual to have someone with them who would be able to facilitate the application process and answer questions on their behalf when they can't do it themselves.
Evidence of meeting #57 for Human Resources, Skills and Social Development and the Status of Persons with Disabilities in the 39th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was benefits.
A recording is available from Parliament.