There are a number of factors that maintain the matrix. Give someone a uniform or a title with authority and they'll change because they'll realise or learn that with their power, they can create a false sense of reality for themselves by harrassing and gagging those that have views and opinions that are different to their own. If you have authority, if you don't like someone's opinions, you can ban or exile them, tell them to get lost, just because you don't like their views!
As far as I can see, the common reality matrix is also maintained largely by people that have a misplaced need for belonging to something, people who will compromise their own values for peer approval and by people at the top of the pile who put self-interest first before the interest of the group they are supposed to serve.
Those that are most enslaved to the matrix also often have an unhealthy obsession with ritual, uniformity and order. It helps them to escape the problems of facing up to their own mortality and vulnerability. Belonging to an organisation and becoming one with it can give one the feeling of being larger than life, immortal even, because an organisation a) has more power than an individual and b) an organisation can last for hundreds of years.
There's nothing wrong with belonging to a social group, per se. The problem occurs when the group becomes hostile to original ideas that can benefit the collective.
Isn't it interesting how those that don't wish to conform to the collective consciousness or the common reality matrix, as you like to put it, are often bullied and picked upon. Practically every fairy tale has this theme, from the Jungle Book to the Never Ending Story but it's a shame most people just see these films and stories as entertainment for kids!