Food is always a concern. Those who control the food supplies are generally the ones in power, but one of the functions of the Daybreakers is to serve as lawkeepers to ensure that humans don't screw each other over, especially in a world where it's already hard enough for a united humanity to coexist.

Of course, Daybreakers can't be everywhere at once, and there are always splinter factions who decided to completely isolate themselves from the rest of humanity in order to do whatever they want, under the assumption that if all the tunnels are sealed, no Tyrant can pry open their little nest.

Females are generally more valued than males, because the population always needs replacing. Take that how you will.