IRS-IT officers sore over delay in promotion

IRS-IT officers are sore over extra ordinary delay in their promotion to SAG. IRS-IT officers of 1993 on wards are waiting to be empanelled  as JS. It is said that empanelment cases of 1993 and 1994 batches of IRS-IT are pending  for the last two years.Whereas IAS officers of 2001 batch have already  empanelled  as JS in GoI. Why this discrimination, they asked?