The thing is though, this idealised idea of the Sahm only really seems to have existed in very middle class circles, or Madmen.
Everyone's mum worked in the 80s and 90s, but it tended to be shit jobs and based around the husband's working hours. Mums were the barmaids, dinner ladies, lollipop ladies, part time shop staff, mobile hairdressers, seamstresses, cleaning ladies. But they were still expected to put tea on the table. They baked because it was cheaper than buying shop cakes. And if the oven was on to roast the joint for the week, you may as well use it.
My grandmothers ( 30s,40s, 50s) worked in factories. Their kids were palmed off on anyone who'd have them.
Sahm in the form people seem to think, was a privilege enjoyed by a few.