My simple take would be world leaders/rich people have decided they want all the other major countries to copy the CCP's model instead of the US. Either because they're stupid/naive or because the CCP bought them off. They think they're the good guys and this is the route to a great reset type thing.

Once vax passports technology is in place it's easy road to a social credit system punishing people for going against the government in other ways. The only thing left to do at that point would be to phase out elections.