Deflation is a great thing.

The working class has been conditioned to think it's "bad" and inflation is "inevitable" because inflation is how the ruling class recoups any gains the working class has made, with interest.

Personally, I think it goes a bit deeper than this. Insecure people always want to feel they "know" everything, so they will often overreach and make claims about something they don't understand just to look smart and fit in. For example, always using the word "consumer" instead of "customer." They want to sound smart, like they went to school and learned about consumers, but they don't realize how they're acting without thinking. It's all a show to avoid admitting they don't really know what they're talking about.

Inflation is the same. Since it's almost guaranteed to happen and it benefits the ruling class, the average worker has been conditioned to see it as beneficial. They are praised for going along with the narrative that inflation is necessary and it makes them "feel smart" even if they are incorrect.

Saying "communism doesn't work" is another example.