> If inflation is "inflating the amount of cash in circulation"

It's not, except when Austrian school adherents are mistaking equivocation for argument. “Inflation” without modifiers means consumer price inflation. Monetary inflation is a thing, but a different thing. Monetary inflation can contribute to consumer price inflation (that's often it's express purpose, compared to not having the policy, as when QE was adopted to prevent deflation), but it is not what “inflation” without qualifiers means outside of intentionally-deceptive rants from Austrian-school adherents