This downplays a significant problem. The man in the story didn't set out to be a forger; it was an opportunity he discovered by chance, based on previous knowledge and talents.
Matching up people with jobs is hard enough with paid work. Doing a better job at matching people with volunteer opportunities that suit them would be a huge win.
Figuring out where best to donate money is relatively easy in comparison; GiveWell does a good job of that.