For Child Sponsorship, why does the monthly amount vary in different countries?

One of the best things about child sponsorship is that it is a way in which people with average income can be involved in development work. Therefore, the monthly sponsorship rate is decided based on the country’s level of income and cost of living. In countries where the sponsorship rate is set at a lower level, it means support from more sponsors would be needed so that the funds required to achieve the development goals in the community can be raised.