Thanos reaches Earth

Thanos, in his mission to restore the ecological balance in the universe, has reached planet earth. He considers a planet ecologically balanced if more than half of the people on the planet have the same Consumption Capacity. There are $N$ people on planet earth, each having Consumption Capacity $C_1$, $C_2$, ..., $C_N$ and Strength $S_1$, $S_2$, ..., $S_N$. Thanos will make earth ecological ba