Why did the economy change that we need 2 full-time breadwinners as opposed to 1 less than a decade ago?

Question

Edit: I meant less than a century ago! My bad! Just a brain fart.

In: 9783

Answer 1

Early 90s required 2 middle class incomes (and 7 years of saving for a down payment) to buy an old small starter home in the least desirable suburb of Toronto.

Even when I was a kid in the 60s and 70s half of the homes had 2 incomes.