In HK, as far as I know, most families hire helpers are to take care of babies/children and to do household chores, this is their basic job nature, and it is also the reason for the existence of helpers. There is no offical scale, but government has set a minimum wage as a reference, so they think it is a reasonable wage for a domestic helper who are provided with accomodation and food. Like I said, we should pay a reasonable wage according to the job nature, minimum wage is good enough to hire a helper to carry out ordinary household chores and babysitting/childcare, as this is their basic job nature. Some families who require helpers to look after members with special needs may need to pay more for a helper with this kind of experience. To pay higher wages are up to the employers, but I think it should be kept within a reasonable scale. I agree with that bonus or extra money like red packets are a better option to show your appreciation to a good helpers.