If consumers believe that inflation will remain high, they tend to save and not buy goods and services, thus tempering demand in the economy.
The cause of inflation (at least in mainstream economics) is that consumers want too many currently produced goods and services because they don't want to hold as much cash (e.g. because its value is decreasing because of loose money).
The behavior described in the WSJ is a potential mechanism to bring inflation down (i.e. a drop in AD)!
See also Nick Rowe on why economists think inflation could be bad (emphasis on the could):
Economists would instead talk about shoeleather costs, menu costs, relative price distortions, difficulties of indexing taxes, confused accountants, etc.
In the ITM, if you have high inflation, you're in luck: the quantity theory of money is a good approximation, monetary policy is effective and you can use it to control inflation!