Catholicism: How to treat beggars? My country is full of beggars asking for money, sometimes it's kinda family controlled business, the parents ask their children to beg for money and then steal the money from them, some beggars are really poor, others are just scammers. 

But you don't have anyway of telling, the vast majority of people either yell at them or ignore them or tell them to go away or act as if they never saw them.

I don't imagine that one could pay each and every beggar he sees on a daily basis, and the people in my country aren't rich and there are too many beggars out there.

From a roman catholic point of view, how should common people treat beggars? Is ignoring them a sin? What does the church and saints have to say about that?
Here's an example from St. Robert Bellarmine's life (ch. 30 of 35 Doctors of the Church):


  Not only did he give freely to those who asked, but he remembered those who were too embarrassed to ask, too reserved to beg. He sent out men to find such cases and helped them. He was often “taken in” by beggars who were not deserving. Some came back in disguise to receive a second alms. He knew this, but his principle was that it is better to be deceived a hundred times than miss one genuinely in need. No wonder the people of Rome called him “the new Poverello,” referring of course to St. Francis of Assisi, his patron.