a. This changes the role of parents, witch is parenting. When parents leave their children, someone else is parenting them.
b. The only positive effect on the families is the money. The negative effects are the absence of attention, relashonship problems.
c. Society becomes "dead". No young people in the country: only granparents and children.
d. They may face documet issues at the airport. Also, the break up with their family is painful.