Well, we can just give a 2 dice bonus to all grids. (High tech, and fancy networks). That means that public grid will have no negatives, but private grids are still better, with even faster access to data.
It sort of implies, that the public of Korea enjoys matrix access that is comparable to the middle class in other countries. Something that is realistic considering that there is a central entity that is in charge of matrix access. Probably as a means to keep the masses happy and gain popularity.
Another aspect that may be interesting is that IC is accumulated slower as there is a significantly higher matrix activity. This may be offset by the fact that IC are stronger in Korea, (+1DV ? ) due to a large number of software experts in the country they make better IC. Otherwise we could say that it balance out as the police in Korea is owned by the government all across the country. That is if you are burned you are burned, it is easier to commit crimes, but there is nowhere to hide once you are discovered.
We already said that decks are cheaper in Korea, that means that they are easier to find. There is an unusually high number of deckers, and they are somewhat of cultural heroes. Therefore, the government only interfere when people that really over do it, and has to tolerate the smaller offenses due to lack of resources and the fact that the public really like stories about ace deckers.