Passive rich are usually severely hurt by inflation as well. One feature of inflation is that interests rates rise to cover expected future inflation. High interest rates = low asset values, since the value of an asset is the discounted value of all future cash flows and the discount rate goes up with prevailing interest rates. In theory companies' earnings should rise with inflation, but in practice existing companies are often too locked into existing price structures and competitive markets. Additionally, anyone with fixed-denomination assets (bonds, bank deposits) sees the value of them decline in real terms since the dollar is worth less.

The main winners of inflation are:

Adaptive over passive. As you mentioned, the average blue-collar wage growth always lags behind inflation. We aren't really seeing white-collar wage inflation either in the U.S. right now though - fast food workers are making $22/hour and Amazon drivers $18/hour, but FAANG engineers are getting laid off. Who are the winners then? The people who swap jobs or swap industries into ones with pricing power, or who found new businesses enabled by changing price structures. What we're seeeing in the U.S. now (with ~5% wage inflation) is that the 80% of wage earners who stay put at their job are getting ~0% raises, while the people switching are getting ~20% raises.

Debtors over savers. This is well documented in econ textbooks - inflation is a transfer of wealth from savers to debtors, because debtors can pay back their debts with less valuable money.

Governments over citizens. Partially this is because of government usually being a net debtor if it gets into a position where inflation happens, and partially it's because of the government's power to issue new currency. Plus tax revenue is usually a percentage of economic activity, so if all prices & wages increase by a certain percentage, so do tax revenues (and the government can bracket-creep you into higher tax brackets).

Poor people usually fare worse than rich people because of the adaptive vs. passive bulletpoint - they have fewer options and less awareness of options than richer people do. But the debtors-over-savers effect works in their favor: poor people usually have higher debts than rich people, and inflation is a form of debt jubilee. If, for example, they jump into a fast-growing new business started because of inflation (like Microsoft or Apple Computer in the 70s) it could be their ticket out of poverty.