Yeah that was Keynes’ reasoning.

But no central banker ever says why specifically 2% inflation is the target.

Why not 0.1% if they’re such amazing economic managers that they can control the economy via interest rates? Why not 5% if they want to claim that inflation stimulates growth?

2% is arbitrary and they don’t ever want to talk about the arbitrariness of it because they have literally no answers. 

They just throw it out there as if it’s centuries old accepted wisdom when in fact it is completely baseless. 

 I buy that