Some of it is voluntary, some of it paid. The friends I've got who volunteer are either part of the Lifeboat crew or Coastguard cliff rescue team. But lifeguards are paid, and so are the Helicopter crew.
Not sure about banging people up lol, but yeah there's a case to be made for repeat offenders to be charged. Trouble is, it will likely be people who are skint anyway and could never afford to pay the bill.
Why not I say. I've always suffered with problems around my MH, if I gave any indication I would harm myself particularly when in my youth, you'd get locked up for your own safety (don't know if that's still a thing). So why not people that put themselves in harms way through irresponsibilty. Although the lack of prison places these days, they'd probably just ban you from the pub instead.
Also those stupid ****s who try and climb mountains they’re nowhere near capable of. Some Dutch vegan tried to do Everest fairly recently to prove, in her words, vegans could do anything. She died. Sherpa had to carry her corpse to base camp to get flown home. Someone in her group who also died was attempting it for the fifth time having failed each time before.