That's the way it is in my household. And, as an E6 in the military, I'm hardly rich.
I work to pay the bills and my wife stays home with our two young sons. She cooks and cleans and still finds time to relax. I cook the boys breakfast on the weekends to give her time to sleep in a little bit.
Funny thing is, I believe we actually save money with her staying at home. Our restaurant bill is almost nil, except for Friday night when I'll order Dominos and once or twice a month I'll take the family to McDonalds. I bring home-cooked leftovers to work.
The media wants us to believe that it's impossible to make it unless both parents are working. This is a lie. We save money on daycare, a second car payment, restaurants, and still have money to get nice things like a decent TV, computers, cable and internet, jewelry, clothes, tools and hobbies. We own a modest home in a solidly middle-class subdivision and drive a 2014 Toyota minivan. One of these days I may buy a used pickup truck, cash out of pocket, but we don't really need it. I tuck away a little into a savings account each month. I use no more than 5% of my credit card limit, mostly just to keep my credit score high.
According to the conventional wisdom, we should be broke but we're not struggling at all.
We save money on daycare....
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And even better than being economical is that your choices allow your precious children to be cared for by their loving mother rather than by some paid stranger.