Everyone knows what happens to the police and the military in corrupt states: these are the kind of places where you carry extra cash for bribes.
Everyone knows what happens to the police and the military in authoritarian states: disappearing people in the night, extrajudicial executions, firing on protestors, etc.
In either case, these groups end up doing exactly the opposite of their original purpose: upholding the rule of law and to protecting the citizenry, respectively.
Based on historical examples, how (if at all) have other emergency services behaved in corrupt/authoritarian states? Did Nazi Germany/the USSR/South American military dictatorships etc. even have civil ambulances, fire services, etc.? Did those services continue to act as before, or did they change their fundamental character, goals, behaviour, etc.?
Some possible examples
Perhaps Nazi and Imperial Japanese experimentation on human subjects would count here, but I don't know how much that was endemic corruption of the entire medical establishments of those countries at the time and how much it was a handful of (usually military-associated) sadists.
Perhaps a better example would be the APA's complicity in US torture policies, but this is specialised body's moral lapse rather than a case of the whole field of psychology going rogue.
Coast Guards seem to be the only other force who suffer from this kind of corruption—see Greek and Libyan examples—but their role is naturally more police/military-esque than the services I am curious about.
Incidentally, this question was inspired by this news story about Chilean police allegedly blocked paramedics from treating a protestor suffering a heart attack, which I had initially misread as claiming the paramedics refused to treat the protestor. That is how I would expect to see this sort of corruption manifest, but I am not aware of any stories of that sort of thing from Nazi Germany, Syria, the USSR, North Korea, etc.