You're being massively dishonest if you're going to conflate "technological progress resulting in greater societal wealth and lower prices" with "monetary deflation". In fact, looking at some historical inflation data (http://inflationdata.com/inflation/Inflation_Rate/Historical...), monetary inflation tends to correlate with technological process and economic growth, while monetary deflation tends to correlate with recessions and depressions.

A growing economy paired with a fixed monetary base, incidentally, will end up resulting in monetary deflation, which will more likely than not put an end to the growing economy. That was the author's point, and it's borne out by historical data as well as nearly all contemporary economic theories (including, perhaps to the author's surprise, the theories of Milton Friedman himself).