Debasement means prices go up. That's fine.

- Both prices for income and expenses go up in lockstep. If your expenses go up faster than your income then you have a problem with the value of your work w.r.t. to other goods and services in the market, not a problem with inflation.

- Prices go up according to a pre-determined schedule, e.g. 2% a year. The government announces that beforehand. So this can be taken into account when planning financially. When inflation is higher than expected like last year in many countries then that's a problem for planning and the economy will take a hit. We could probably do with a better government. But nothing wrong with inflation as such, I can plan with it just fine as long as they tell me beforehand.