Many of the factors related to work ethic today also existed in the 1960’s but the changes to the family unit is something that can be measured. I just Googled that phrase and got this from the Hill in 2021:
“American families with children living with a single parent has
tripled since 1965. 75% of these single-parent families are headed by a mother only. In 2020 25% of all US children were living in single-parent home. That is nearly three times the level in 1960 of 9 percent. Single parent homes in the US are more than
three times the worldwide level of 7 percent.”
It's the elephant in the room that nobody wants to talk about.