Bearhunter, the thing about comparisons with the animal kingdom is that they work better the fewer species you know about. There is an awful lot out there, most of it bears little resemblance to human capitalist society, and some parallels are extremely dubious.
Just to treat you to a little variation:
In quite a few fish species, the female is completely incapable of performing any care for her offspring once the eggs have been laid: this task is performed by the male instead.
Some crocodilians also delegate these duties to the male, others to the female.
In many species of fish and birds, parental duties are shared and both parents perform the same task of protecting and/or finding food. Can you tell me what a male eagle does that isn't equally performed by a female eagle?
In lions iirc, most of the hunting is performed by the female, who tends to provide for the group, while males are often happy eating carrion.
If we're looking at actual numbers, then most animal species probably don't provide for their young at all.
Most animal species don't do anything comparable to human work anyway, so are of limited use for comparison. But animals that do, such as beavers, tend to share the work. Nest-building tends to be performed by both parents, though sometimes only by the male.
Some animals give birth through parthenogenesis. Some do sex changes. Some eat the male after intercourse. Some eat their newborn babies.
Who decides what species we should emulate?