That's the actual textbook MMT view. "Prices go up because people think prices are going up" - they think it's all psychological. That's actually what their books say.

Posting fake inflation numbers and propaganda reiterating that inflation is low is all part of constructing that reality. It's like Santa Claus at Christmas; all the adults play along and the kids believe the magic. Santa is at the mall and the propaganda is everywhere so all the kids believe.