Are they living in a 1,500sf house (median size in 1960)? Without AC, no cable TV, no computers, 1 car, no exotic / organic foods except from the garden, few toys, 60’s era medicine. Do they actually repair or even make clothes? How about home repairs?
My mother was a teen in the 60’s and while objectively they were well above the median income for the time period in many ways they lived like extremely poor people do in 2024. Some of that was actually saving money for retirement, but mostly it was just far lower expectations.