The general assumption at face value when it comes to the repayment of debt is that, eventually countries pay up and are free from indebtedness. While this is true principle, it is quite different from what is in practice. Here's why;
Almost all countries just prefer to only service debt than not having debt. This is the world has been since many years ago. The government believes they can achieve more without no being in debt. Although some countries are in low depth, while some countries like United States are in high dept but well developed.
What this means is that, inflation is may become politically preferred to austerity, changing the long term meaning of currency preservation.
Inflation has been politically preferred since fiat was created from nothing.