system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do countries have problems with low inflation (Japan, Canada now)? Can't they simply print more money to keep inflation in the desired range?
gpt
Two reasons:

1. It is politically unpopular. Some politicians don't see low inflation or even deflation as a problem, and it's easy for them to score points against their opponents for "devaluing [constitutents'] money" even if that is the appropriate course of action.
2. When interest rates are very low, it can be difficult to produce inflation via money-printing. It can be a difficult balance, because when the economy recovers and interest rates rise, the central bank may have to choose between accepting higher-than-optimal inflation or undoing their work. Japan has had particular trouble with this, printing money and then stopping at the first sign of recovery.