Proud nations take pride in their citizens. In most international airports, deplaning nationals are directed to the first bank of immigration counters.
At Delhi's new Terminal 3, first priority goes to those passengers, presumably aged or physically challenged, requiring 'Special Handling'. Next up, First and Business Class Passengers - fair enough, top dollar should get its recompense. Then, Foreign Nationals, followed by PIOs/OCIs (Persons of Indian Origin/Overseas Citizens of India).
The 'aam aadmi', or Mango Man, comes last.