When wages go up 20%, they go up 50% for the top quintile and 5% average for everyone else (or whatever the math is, preserving the general proportion). When prices go up 15%, they go up 50% on mandatory expenses and 20% on discretionary spending, and the basket of goods used to index inflation for both is massaged until it looks like a 15% increase overall.

That said, your assessment of the psychology of inflation is correct. It's just inapplicable here. The issue isn't people not understanding how much richer they are, because they're not. It's the intelligentsia and "elite" refusing to acknowledge the reality, because they'd then have to actually make material changes, which would reverse the siphoning of wealth from the middle class that they've been engaging in for at least the last 30 years.