The fact that you need to provide so much more value as a worker isn't due to the fact that both parents tend to work (at least not directly) it's due to the fa

The fact that you need to provide so much more value as a worker isn't due to the fact that both parents tend to work (at least not directly) it's due to the fact that modern society has much more rent seeking than previous generations had to deal with. Because most families have more wealthy individuals can squeeze families more before they reach the breaking point and have done so to the point where the average family doesn't have as much spare as it should given everyone's productivity. The inability to have one working parent support a family comes down to wealth inequality like a lot of modern ills.