Keep in mind, back then there was less stuff to buy. We didn’t have all of the gadgets we have today, heck a lot of families didn’t even have a car.
The only kids I knew who had their own bedrooms were either only children or their sib was the opposite sex.
I'm not knocking living well, but many of us have developed expectations that are pretty high. Most of us still live far more opulently than any other group of people in the history of the world.