To have or increase the income of a poor family
To reduce the labor cost in a production organization
Misc. reasons for engaging as domestic aid as the children are less doubtful about dishonesty or less liable to misbehave or be violent.
In a developed society where every citizen counts and all citizens have to have proper education, health care supports, games and entertainment and complete his education so that when he is a fully grown adult he can get a full employment with standard salary.