One big problem is that people have died in the mobs that swarm him for help so you have to wonder about his net effect.
Ponari may have god-like healing powers, but he's a disrespectful little runt just like western kids. Just look at this photo. Impoverished disease-ridden travelers gather to touch his special healing rock, forking over money they scraped together for the pilgrimage and what is Ponari doing with the other hand? Texting his buddies on his new cell phone!