They plan to operate a Planetary Accounting Office, and even a Planetary Banking System. Establishing cordial relations with aliens is a most pressing priority and deserves an office somewhere. The sheer size of the public service in the world government beggars belief. It formulates and defines standards, qualifications, tests, examinations and salary scales for the staff of all organs, departments, bureaus, offices, commissions and agencies of the World Government. It draws up lists and rosters of competent people and selects them for the various organs, departments, bureaus, offices, commissions etc.
People working in branch offices frequently complain that head office is remote.
Imagine what One Big Head Office will do for communication and decision-making, let alone morale and efficiency in the bureaucracies of the world government. All these agencies are supervised by 10 member commissions selected from the Houses, the Collegium of World Judges, various other agencies, the Office of the World Attorneys General etc, etc. More bureaucratic seat-warming. There will be five World Capitals, one of them a Primary World Capital. And the World Parliament may decide to rotate its sessions among the five capitals, if you please.