Basically, it comes down to who actually gets the money generated by an increase in M2. If it's people with a low propensity to consume / buy things (i.e. the rich), then extra M2 is not inflationary (caveat: not inflationary for goods. It's inflationary for stocks/real estate/etc instead, since that is what rich people "consume").
If it's people with a high propensity to consume (i.e. the average citizens), then it is.
Capitalism!
It only makes sense to refer to what you described as a phenomenon you want to pursue if you want to run a successful business, but can never be used to describe the economy as a whole.
See also Japan: