His "point" makes sense from a pure mathematical standpoint. If I have $100 in the bank and receive 2% interest annually on it, I have $102 at the end of the year. If inflation is 3%, that $102 needs to be $103 at the end of the year to keep up. So, technically, I've "lost" $1 by doing nothing. The entire theory falls apart if I don't invest/spend that $100 wisely in hopes of making it worth more than $103. Poor spending/investment makes it worth $0. Jacking up inflation in hopes of "forcing" me to make the "smart" decision to spend/invest simply doesn't work because of all the fixed income people, and that includes people who have jobs that spend virtually all their money every week on necessities, who are damaged by inflation.
Making a point that inflation stimulates the economy is dumb.