You can have a much higher standard of living today with one person working than you could in the 60s!
You are absolutely wrong. Real incomes are way down from 1960's standards. In 1960, my parents could own their own single-family home, send two kids to private school and college (no student debt!), set themselves up for a comfortable retirement, and take a couple of vacations every year. Buy a brand new Chevrolet Impala every 4 years. And then leave the paid-off house to their kids, along with a nice bit of change. And my father was a machinist who did not finish high school.
Tell me, do you really believe that a family of four could live like that today on one salary? Let's have a show of hands: How many of you reading this believe a family of four could have this type of a lifestyle on one salary? I'll be most of you won't get this lifestyle with two. And your kids will start life with six figures of college debt.
I could certainly make enough helping people install their home theater systems to have them help me with interior decorating, and so on.
So, you see us going to an all-barter economy? When? And what are you going to use to buy food? You going to trade home stereo installations for a loaf of bread?