If you’re rich enough, you won’t keep your value in cash, but rather will buy some assets using it (equity, property, whatever). If you’re rich enough and smart enough you’ll have realized that you can take loans to finance asset purchases in effect shorting the currency.
However, if you’re not rich enough, depend on your wage, and can’t short the currency by buying up assets, you get the short end of the stick. Some say this is by design.
I recently read an article in the Economist arguing how income inequality has actually gotten better in the rich world. They argued that the wage gap between blue collar and white collar workers has been shrinking. I expect that to accelerate with the advent of AI.
But the wage gap says less and less about income inequality when the society gets divided into owner and wage bound classes.