Unless you don't think that being a stay at home mom or dad is a real job, we've always had two workers in every nuclear family.
Notice though that our standard of living is up is not in question. You are merely debating *how* we raised said standard of living now.
One thing I have noticed the cost of beef is getting quite high. I am eating alot fewers steaks these days, but in the 70's I had steaks all the time.