For "high paying" I guess it depends on how much your earning potential at your current job is. Off the top of my head, there's a few dangerous but very high-paying blue collar jobs - Crab fisherman, oil rig worker, and the like. Working with carcinogens and radiation is also a go, as mentioned elsewhere, though I'm not sure about compensation there. For "social good", Terminally ill patients are at least eligible to volunteer to test drugs for their particular illness.

I'm still in the "spend time with your loved ones and help them come to terms with it" camp though.