There are subtle differences between bums, beggars, hobos, tramps, lunatics and the crazies that talk to themselves. Each continent and culture has separate kind of each.
Poverty has many bums, beggars, and lunatics, be a gentleman, and grant them the right of pride.Read
Amputees: This is a beggar to help.
Wheelchairs: Another beggar to help.
Old Old Old People: This is a good person to help.
Asking for money is often different than begging, you must look at the bare feet and clothing, if a person is wanting money, but has shoes, good clothes, then the are just a mooch.
Orphans: Contrary to silly world views, orphans are adopted quickly, easily, because people want more children to work.
Ophans that are disabled: This is the true problems on the planet, when they are mentally ill, diabled, etc. They have no value to a father and mother, and they are abandoned.
Bums: Normally aggressive, normally begging and extorting money, an extreme form of being lazy.
Beggars: People who are not thriving or able to work and resort to asking for money.
Lunatics and Crazies: Generally they do not beg, are given food by the locals and walk around talking to themselves. Often in Africa they will be walking around naked.
Street Children: It is difficult to know if they are truly street children, you should not give them money, unless you see them sleeping in the morning near the street.
Street Urchins and Mooches:
Beggar Rules: Generally, it is not wise to give to beggars unless they are missing body parts, an arm, leg, eye etc. Truly old people and decrepit people need money also, and that is OK. Many countries promote begging to tourist, whereby they are racing to the bottom of the HDI. (Human Development Index) The lowest rungs of the HDI often get the most free money from the rich countries, and that money goes almost directly into the pockets of the politicians.
If you want a good reason to leave the city, give to a bum hanging around in front of your hotel, you will soon understand, they do not go away once they found their easy mark.
As long as outside forces are willing to perform the social work of a country, and enable the country to not shoulder the burden, the beggar problems will grow.