Buddhist monk (Score 1)

The pay sucks, but you can often beg for a bite to eat. Of course, you don't need to make as much money since your expenses will be quite low once you've given up everything but the robes (just think, no more car insurance or property tax). World peace is certainly a challenging enough problem to tackle, and the 10,000 steps you take (to start with) should keep you in fine shape...