The actual social structure should be that the 1st class intelligent class, the brahmanas should be for studying and educating people for God Consciousness. The are the gurus of all other classes. They second class, the ksatriyas give protection from dangers and they can distribute the land. The third class Vaisyas are for producing. So after the first, second and third class, the remaining should help the upper three classes, then everyone will be employed. As for speaking this knowledge effectively, that requires a little experience. The more you are experienced then you will be able to give examples.
Letter to Balavanta, 28 April, 1974