I don't see how. Even if there are enough people, would they be educated enough to maintain things? If everyone with half a brain is destroyed, that means scientists are going to all die. Then, what happens if you need something? How are they going to build homes for all the resurrected (and maintain people's homes) if they can't get materials on site? People are not going to be able to engineer simple items like lumber, hardware, and furniture. It takes intelligence to build a house without nails (it can be done, but it requires precision cutting of boards to fit together). Glass of sufficient quality to see through is not easy to make without factories. And, if there is no running water, how are they going to keep standards of sanitation up? Remember, the Filthful and Disgraceful Slavebugger has been hounding people to stay physically clean--in the God's Tyranny book, that is one of the elements of cleanliness.
And, how is news going to spread? Suppose the Filthful and Disgraceful Slavebugger has new instructions. They could be stationed in New York City. They expect everyone in the world to respond instantly, or they will all die. But, without high speed travel or telecommunications, it could take years for information to spread worldwide (and be out of date by then). Just getting a letter or message from New York City to Boston could take two weeks, and what happens to people in isolated communities? They could issue a ban on sex in New York City on the first, and it would be the middle of the month before such ban reaches Boston or Buffalo. And, another two weeks before it reaches Portland, Maine--what happens to people in places like Cherryfield, Maine or Errol, New Hampshire? It could take months for a message to reach Ellsworth, Maine (and another week before it reaches Cherryfield or Machias--or Bangor, for that matter) without high speed delivery. By that time, anyone in Machias, Maine, would be in violation of the new laws. Remember, Jehovah does not accept ignorance to the law during the New Dark Ages as an excuse.
So, are people to bunch up near New York City so they can get the message in real time? Isn't that what they bash Nimrod for doing? Nimrod wanted to create a big city, and the Bible (and the witlesses) view this as wicked. God supposedly wants people to spread out--that is why such small towns like Cherryfield, Maine, are supposed to still be there. But, if people are scattered, and there is no high speed communications system, people in outlying towns are not going to get the message. And, ultimately, they are going to die because they are in violation.
If they cannot solve this issue, with the ban on college (and the Internet, which would be the ideal means to reach Cherryfield Maine in real time from New York City), there is no way the witlesses are going to possibly run anything--even if they have enough people to do it.