They are.  When they can get away with putting in minimal effort , while making a lot of selfies and pictures for their bragging, they will take a short-term "job" for charity.  You see it not only with charity, but also with regular jobs.  I'm sure you know some fats that demand pity when they are without job, and then shit on everybody else when they get a temp job for one afternoon because "I'm a saint and strong for showing getting a hard job is easy" The guy in the comic is probably based off somebody who gives out least food as possible and eats the rest in-between making pictures of himself.