Predicting inflation rates may be harder than discovering the birth of the universe actually, because it would require perfect knowledge of the present and by the time you compute it it's out of date.
Maybe the problem isn’t complexity, but that science gets arrogant when it drifts into realms where its claims can’t be falsified ;-)
It most certainly is. Each of those 340 million citizens is a unique person, with unique circumstances. You can't fit an equation to that.
>science gets arrogant where its claims can't be falsified
This article proposes testable predictions?