I don't think GP is talking about money when they say "cost". They're talking about the cost to a child's healthy development when it comes to independence, freedom, and learning how to deal with adverse situations without knowing that mom or dad is constantly looking over their shoulder (figuratively, in the tracking case) and can pluck them from said situation at a moment's notice.
The choice on how to act when your child is in trouble is still yours.
It's very obvious to me that a lot of people engaging here don't have children.
There is a lot of idealistic posturing.
Do you really think a child takes developmental damage by feeling cared for and protected?
