@carriegirl1,
In some ways I think a nanny can be something good.
Children will always know who is Mother and who is Father.
Reasons to take a nanny even if the mother is not working can be many, but what I have seen have been very positive. That has alwas been a person from your own country who has been treated well and got correct wages and free time.
How things work out in modern times I donĀ“t know, but I know several of the older generations who had nannies who stayed with the family even when the children had grown up, became housekeeper and a friend in the family.
My nanny married when I was four and she married a very nice man and slowly a lifelong friendship developed between my family and hers.