Youngsters washing cars and helping about the house may be so ubiquitous and accepted a part of daily life that their presence goes unnoticed. In many Third World environments there's nothing remarkable either about children who sell flowers, peddle trinkets on the beach or stick newspapers through your car window at the traffic lights. But because such children are on the street, beyond adult control and may cause a public nuisance, this kind of child work is noticed and deplored. Domestics are safe at home doing ordinary things under watchful adult supervision. In most societies where children are employed in domestic service, the practice is seen as okay.
People do recognize certain cases as grossly abusive or exploitative.
The employer who attacks her child domestic with a red-hot iron is clearly doing something wrong. X was abused in all three houses where she worked. Or 'Y was beaten up by family members for the slightest mistake. But these appalling cases do not necessarily mean that society condemns hiring girls as maids. She is being taught to dress well, speak well, run a house nicely, cook, clean and do all sorts of useful things.