He does state that if help had arrived sooner he would have been considered a hero rather than a butcher! Not sure how, but there you go!
It should always be emphasized in these discussions that Kodos didn't have a leg to stand on.
There are exactly two scenarios for a shortage of food, and neither of them can be solved by killing half the hungry mouths.
1) Food is gone (save perhaps for a token small supply) and new food only arrives after a known interval of time (regular resupply, emergency resupply, new crop).
2) Food is gone (save perhaps for a token small supply) and there is no new food coming.
In the second scenario, everybody dies in the end, and the killings don't help much. But if the idea is for Kodos and his closest followers to live longer, then killing 50% of the cattle makes no sense - killing 99% and throwing it in the freezer would make a revolt less likely, while killing 1% and eating it fresh (and emphasizing how this is for the common good) would achieve much the same in the absence of freezers.
For the first scenario, the length of the time interval dictates everything. If the interval is long enough, it becomes the second scenario, and the above applies. But if the interval is short enough for 50% to survive without any food, then it is automatically also short enough for 100% to survive.
And if it is short enough for 50% to survive on what little they have, then it is most probably short enough for 100% to survive on 50% of what little they have. Shortage of food is unlike shortage of oxygen or money: the human body can stretch immensely and unpredictably, up to three months of total lack of food if need be.
Of course, if scenario 1 involves crops, then the planet can apparently sustain life. So nobody need starve, or even feel hungry - there's an entire planet for mere 8,000 people to eat between themselves! Crops would probably also involve a cycle of 12 months, considering how Class M seems to be the galactic standard. So there's no way to stretch the three-month endurance of humans by killing half of them for the other half to eat - 99% would have to die to sustain the 1%, and we already discussed that.
So Kodos killed purely for the sake of killing. Which makes one wonder if it wasn't him who arranged for the famine in the first place...
Timo Saloniemi