Question: why njac is better than collegium?
Answer: The NJAC would have replaced the collegium system for the appointment of judges as invoked by the Supreme court via judicial fiat by a new system. ... Khehar, Madan Lokur, Kurian Joseph and Adarsh Kumar Goel had declared the 99th Amendment and NJAC Act unconstitutional while Justice Jasti Chelameswar upheld it.