Then prove it.
We have an incredibly larger number of households now compared to 1967 and even with that increase in numbers, the average real income of the American family has risen dramatically. I suspect, should you really do your homework, that you'd find that the number of single parent households today is very large and refutes your assertion that the increase in income over the years is solely because both parents are working.
In 2002, 18.4 million married families with children, almost 68 percent, had both parents working. In over 55 percent of these families, the women were working full-time, year-round. From here.
I suspect, should you really do your homework, that you'd find that the number of single parent households today is very large and refutes your assertion that the increase in income over the years is solely because both parents are working.
There are the facts. Believe them or not. I did not state that the increase was "solely because both parents are working". Even the WH sees this as a problem. But, to a super-capitalist like you it's just the way things ought to be.