Once again, I'll repost something I've said many times before...
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...the WTS has stated on more than one occasion that even though the leadership supposedly expect to be "raptured", the Organization itself fully intends to be around to govern the post-Apocalyptic world, and direct the building of their vaunted utopia.
But I guarantee you that If the WTS were given control of a small country tomorrow, within a decade free speech and freedom of religion would be nonexistent, any form of alternative sexual expression would be outlawed, creationism would be mandated in schools, medicine and science would be severely hobbled, disfellowshipped people would be imprisoned or deported, and "apostates" would be sentenced to death without possibility of appeal or reprieve. (Anyone who denies this is either naive or simply lying to themselves.)
Now picture that regime encompassing the entire planet.
Indefinitely.