Bullsh*t. In the middle of the 60s and 80s is the 70s, when Nixon cut the gold window and inflation ran riot. It was the 70s inflation that forced 2 income families, not the other way around.
More folks producing more stuff does not create inflation, it usually creates deflation if the money stays stable.
Sorry, it started in the mid 60’s and ran to the early 80’s when the bottom fell out of the jobs market.
It wasn't high output that drove the inflation, it was the dual incomes of bloated union wages and the spending spree that resulted from that.