As stated in Bhagavad-gita (4.8), paritranaya sadhunam vinasaya ca duskrtam. The sadhus, the devotees of the Lord, are always eager to advance the cause of Krsna consciousness so that the conditioned souls may be released from the bondage of birth and death. But the asuras, the demons, impede the advancement of the Krsna consciousness movement, and therefore Krsna arranges occasional fights between different asuras who are very much interested in increasing their military power. The duty of the government or king is not to increase military power unnecessarily; the real duty of the government is to see that the people of the state advance in Krsna consciousness. For this purpose, Krsna says in Bhagavad-gita (4.13), catur-varnyam maya srstam guna-karma-vibhagasah: “According to the three modes of material nature and the work ascribed to them, the four divisions of human society were created by Me.” There should be an ideal class of men who are bona fide brahmanas, and they should be given all protection. Namo brahmanya-devaya go-brahmana-hitaya ca. Krsna is very fond of brahmanas and cows. The brahmanas promulgate the cause of advancement in Krsna consciousness, and the cows give enough milk to maintain the body in the mode of goodness. The ksatriyas and the government should be advised by the brahmanas. Next, the vaisyas should produce enough foodstuffs, and the sudras, who cannot do anything beneficial on their own, should serve the three higher classes (the brahmanas, ksatriyas and vaisyas). This is the arrangement of the Supreme Personality of Godhead so that the conditioned souls will be released from the material condition and return home, back to Godhead. This is the purpose of Krsna’s descent on the surface of the earth (paritranaya sadhunam vinasaya ca duskrtam).

Srila Prabhupada, SB 9.24.59, purport.