This works for the charities almost all the time because interventions like these appeal to the human side as people are more likely to support causes like these.
Also, if children are sent door-to-door, this will compel people to give as they are less likely to suspect children since they are always potrayed as innocent.
Since these school-age children are usually involved in fund raising programs in their schools, donors are less likely to suspect fraud as fund raising is already popular among them.
Therefore, this makes is easy for phony charities to hide behind an already existing and legit system.
