JKSManga
Just because you want to use the greedy-human trope, you don’t have to forget common sense, with a war that could break out at any moment, the most logical thing would be to offer lower level books to all. If you have up to level 8 you wouldn’t feel threatened by levels 1 or 2 ability and it would increase human strength immensely overall. The government has no interest in making humanity lose the war.