Who is more eligible for reservation?

An Indian citizen has written following letter to the editor of a prominent daily newpaper:
"You have rightly said that Yadavs in norh and Nadars in south can not be considered backward anymore. Historically also Yadavs have not been a deprived class. They were neither denied entry into temples nor considered untouchables. In ceertain pockets they have been a ruling class while Brahmins according to Puranic stories have mostly remained below poverty line. Lord Krishna from the Yadav community was a king and Sudama, his classmate in Sandipani rishi's gurukul , was a poor Brahmin. So who is more eligible for reservation?"

This is the reality which politicians are ignoring for vote-bank politics.