Now thats what I call a strange analogy!
Catholics were unemployed or forced into low skilled jobs and poor quality overcrowded housing. PS employees are guaranteed job for life, Rolls Royce pensions, pay levels above their private sector equivalents - I'm struggling to see any reasonable grounds to compare them to a genuinely oppressed group. Then again, every example of powerful vested-interest groups that come to mind - point to delusional self-serving arguments e.g. Coal miners in 1970s Britain, Afrikaners in apartheid South Africa, bankers, developers, the legal profession........
Sorry , still don't where you are coming from !
What is happening here at the moment is an industrial relations problem and any comparisons with a centuries old bigotry/ politically driven problem in the North does'nt stand comparison.