fire them. get the one you think is good. As a good leader,

you need to find each person's bright point and put them to right position. like a coach, know what is the player strengh and use them smart. same team, one coach get team to champin and other coach couldn't make team to play-off. 50k for a nanny or a housekeeper is a big deal( of cause, you shouldn't expect them do as good as you do. otherwise there is no nanny or housekeeper).