I think that is the answer.
Most people I know that have two working adults in a houshold.....that actually work a career type job are living comfortably. Not something like mom is a cashier at DG for $9/hr and dad works for a landscape company mowing lawns for $13/hr....Then have a $300/month internet/TV bill, a $1000 cell phone every year with a $150/mo phone bill, eat fast food or takeout all the time, kids have to have the latest nike or underarmor shoes and clothes, and they pay $1200/mo rent and never build equity in a home.
People like that also existed in the 70's to some extent. Just didnt hear about it as much because they were greatful for what they had....and didnt have social media to constantly see how better everyone else has it. Then today....rather than try and better themselves they would rather whine about how life isnt fair and hold out their hand waiting on a handout.
Take the average price of anything back in the early 70's.....simply move the decimal one notch right and its right on par with today. Same for wages.
I think one of the largest differences is work ethic. Back then, even those less fortunate had no shortage of wanting to work hard and earn what they had. And they had a desire to better themselves. Learn a skill or trade, get a good paying job. Now it seems people would rather sit on the couch with their nose in their phone. And have to be cautious about making "too much" because it might cut back their stamps, vouchers, free insurance, etc. They have no desire to transcend their dependency on others paying their way.
Dunno.....just saying on paper.....thing are simply no different than 50 years ago in a monetary sense. whatever percentage the cost of goods and services and real-estate, a comparable job's wages have also increased an equal percentage