I've done my family tree, and rather unsurprisingly some of the lines were fairly well off.
In 1861, I have a 'Gentleman' (aka posh farmer), with SIX indoor servants. He had one daughter and a wife at home.
In 1891 I have a Merchant ancestor with five servants in their house! They had 4 kids, but the house was only about 14-15 rooms.
What on earth meant they needed so many staff? How could a family of three need 6 other human beings to live with them to look after them? How was there even enough work?