Some folks do the opposite and have extended family visit to take care of the children. One of my friends' parents joked at immigration¹ when asked what they were visiting for. "Babysitting" they smiled. They were sternly rebuked, saying they did not have a Visa that would work for employment. They did get let in, in the end, though.<p>¹ A lesson you learn very fast is to never joke while at immigration or customs.
Sounds very related to the situation with "left-behind children" in China[1] (留守儿童), where parents leave their children with their extended family so they can work in larger cities. This has already caused massive social problems.<p>[1] <a href="https://en.wikipedia.org/wiki/Left-behind_children_in_China" rel="nofollow">https://en.wikipedia.org/wiki/Left-behind_children_in_China</a>