People could generally meet their basic needs because those were the only things they spent money on. Life was exceedingly bare-bones. Houses were small. Your life revolved around your job. You cooked all your own meals. You entertained yourself. The list goes on.
All of that said, house prices are alone just bad example. If you went somewhere with cheap land and no red tape, you could get a 70's house at 70's prices (adjusted for inflation) still.