Nah, rationing is too nice and too organised for us.
When we get food, those who can, take what they want, and leave everyone else to fight over the rest.
Crete is massively overpopulated, so losing a few million people here and there to starvation or otherwise is no big deal. >.>
Also, most of the food Corsairs eat is imported from various sources, the largest being: Samura, Hogosha, Farmers Alliance, Zoners, Junkers, independent smugglers and traders, and in no small amount, Corsair raiders (Cambridge and Stuttgart are both rather exposed and full of food to be taken). We can grow some on Crete, as we've survived for centuries before meeting up with the rest of Sirius, but little more than the bare minimum to support a few million people I'd imagine, not exactly helpful when Crete has a population of several hundred million and growing.