These special interest, special help groups have always existed one way or another and always will. I am a catholic and in my grandparents time one catholic always by preference put business another catholics way if possible and would use contacts within the parish or other catholic group to help someone in trouble. In places like London, there were a lot of catholic policemen. My grandmother always insisted on a catholic doctor. That sort of behaviour still applies in other ethnic and religious groups where they feel they are discriminated against minority, which catholics were.
I think we have all heard or know of people who seem to be teflon coated where the police are concerned, and yes, some are masons, but some are linked by their being members of the same golf club or other 'mates' groups. the herd instinct is always with us and many groups still instinctively protect and favour each other.