If there are masters, there must be slaves!, how would this hierarchy benefit anyone, do you think a healthy relationship can be based on inequality?
Also, why do you have secrets? why would anybody hide something?
I believe you are mis-interpreting the term 'Master' think not of it as Master/Slave, moreover Master/Apprentice, if Stonemasonry is our allegorical tool, then there is a natural hierarchy for the Entered Apprentice, Fellow Craft and Master Mason.
Let's look at conteporary cinema, the Padowan learner is still answerable to his Jedi Master - LOL Mind you so is the Sith lord (maybe a questionable example).
And our secret are ONLY for us to identify one another, I will tell you anything about Masonry EXCEPT how we identify ourselves.