It means the people who save by depositing cash in the bank lose value over time, causing them to purchase investments out of necessity (rather than purchasing them because they believe its a good investment). This bids up the price of investments relative to their return, which effectively reduces returns to a level commensurate with the artificially low interest rates.
It also negatively impacts anyone who is long cash for any reason (perhaps their business requires them to retain a certain amount) and anyone who relies on fixed payments denominated in dollars (retirees, pensioners, disabled persons, those on public assistance, etc.).
> After that it sets the benchmark rate of return for your investments.
Those are nominal returns, not real returns. Inflation generates no real returns.
> If your salary fails to track inflation that's between you and your boss who's giving you a pay cut year over year
Nice rhetorical judo, to frame the central bank’s actions as normal and the lack of an increase as a decrease.
> or between you and congress if you're under the minimum wage umbrella.
Alas, if congress could lower the minimum wage without political fallout, economists might suggest they do that instead of inflating the money supply.
> Currency only has value while its changing hands and inflation is an incentive to change hands. If you'd invested in anything at all 100 years ago you'd have just as much value as you do today. If you insisted in sticking a square peg in a round hole and hid your cash in your mattress the whole time, inflation did its job and took that value from you.
This is why time preference should be taught in school.