It is no accident that an association of Government Executive branches is supportive of Government Executive Power. Most governments only have, if that, a functioning Executive branch. The Judicial Branch is normally controlled by the Executive. Legislatures are holding grounds for the friends of the executive, until such a time that they are deemed reliable enough to get a position in the Executive or Judicial branches.

For a worthy iteration of what ever comes after the UN, there should be a branch with representation based on population, a branch with representation based on GDP, and a branch elected by the people of each nation. The second branch would block the “soak the rich” efforts. The first would block enslavement of large nations by the small. The third would be the only branch permitted to initiate laws.