My post was not meant to disrespect the back end at all, I commuted across the country for a number of years, and helped out in the back during service on many occasions. Partly to stave off boredom, but also because we're supposed to be a family, as dysfunctional as we are. Many hands make for a light load. As you pointed out, the front end is ultimately responsible for everything. Justice has a section on pay equity, and you must compare Skills, Effort, Responsibility, and Work conditions.
http://laws.justice.gc.ca/en/H-6/SOR-86-1082/