My observation is - helpers are trying to be closer to children & make them safe in your family. When the children are closer to them, you can't fire them because your chidlren need them.
Soem years ago, one of the friend (a workign mother) told me her helper made good plan; the helper talked a lot & played a lot to her son (about P1 or 2) ( very very close). My friend later was dissatfied with her performance & intended to fire the helper. Her son told his mother. ' If you fire the helper, I would not forgive your forever.' Development is my friend had to continue to hire the helper for sometime & do a bit work with her son befroe firing the helper.
So, be careful to the helpers who are too close to your children.
Secondly, other mothers were totally right, the helpers want to do less at home.