The question is, what have people on welfare in public housing lost? If your $million a year stockbroker husband died on 9/11 at age 35, you lost a million dollars a year to his retirement age. If you missed your SSI check, it'll be replaced. If you missed your free cheese, you got MREs at the shelter. If you were out of your HUD unit, you got a cot at the Superdome.
9/11 compensation was to protect the airline and construction industries, which might have otherwise been sued. There aren't any responsible and vital entities to be ruined by suits on behalf of survivors of national emergencies. Everybody who might be deemed responsible is protected by sovereign immunity - precisely because of situations like this.
People whose houses were flattened are SOL.