Where are you at?
Nannies are cheaper than daycare starting at 1 kid and the cost becomes overwhelming in favor of a nanny when there's multiple kids. You can also have the nanny watch other kids in the neighborhood if you only have 1 kid.
The solution to "kids are expensive" being to just pay someone lower class to do it is absurd.
> You can also have the nanny watch other kids in the neighborhood if you only have 1 kid.
You're re-inventing daycare here.
Nannies take multiple children (up to 4 here in France) at the same time. So he/she can take his/her own.
There is nothing morally wrong with hiring someone to do labor for you.
There are two ways to hire a nanny. The "law abiding as a point of pride" way is comically expensive.
The "pay your neighbor's teenager cash" way is cheap.
If even that's too expensive for you then send your kids to whatever unlicensed, uninsured, unregulated daycare that some tradesman's wife runs out of her house.