Brahman is not a title that should be inherited, but achieved. Just as Kshatriya or Vaishya. A coward may have been born in a family of warriors, but he himself cannot claim to be a Kshatriya. Every single soldier in our armed forces is a kshatriya, when the fat asses sitting in ac offices or palaces claiming Kshatriya bloodline, are not. Similarly if a person born in lower caste home is eager to devote his or her life in worship of the Gods and learns to perform every ritual to perfection, he will be a priest and if learns the Shastras and philosophies of Hinduism, he will be more of a Brahman than average Trivedi, Chaturvedis, Mishras, Sharmas, Tiwaris, Chakravarties, Mukherjee-Banerjees who cannot utter a single shloka, could ever be.
In our original tradition and society itself it is defined that the status in society is determined by not inheritance but merit and achievements. The tradition got corrupted and coopted by the people. Now again the tradition can be rejuvinated.