This concept about only one parent working.
This has only ever been a middle class phenomena. Historically The upper classes didn't work but then neither parent actually brought up the child, this was left to employed staff. The middle classes, where the patriarchal belief system was supported by notions of snobbery. If you look at advertisements in the women's magazines you will see they depict women being almost orgasmic ally happy about some new bloody washing machine. However working class mothers worked and worked bloody hard out of the family home as well as in it. In fact latch key kids were those of 40 years ago
Surely you do not think that all the bright sparks of today, politicians, sociologists, criminologists, child behaviourists, police etc etc, who can not come up with one simplistic answer , might have considered you point of view and discounted it as the solution. They probably like most right minded people realise the problems are complex and multi layered requiring many different responses.
And what are dire consquences?