They are not inflating the numbers, just fulfilling their own promises. The government was pretty much clear in its original plan that it will be initial doses. Initial doses alone do have a positive effect on the reproduction number so this is to be expected.

> We're short on vaccines, which is why the number of people fully vaccinated has stagnated for weeks since June.

If you've got paid and paid your rent in the same week you are not short on money (at least in the common sense), just that your expense is not uniform across weeks. The governmental vaccination plan has been very much non-uniform, partly exaggerated by the fact that SK has a very strong vaccine supply chain and everyone seemingly wants to be vaccinated given a chance.