A price tag does not accurately measure the value of anything.

Most of us accept this on some level, yet we spend lots of time living as if prices do accurately reflect value.

And some of us are deceived entirely. There are monetary fundamentalists among us.

It isn't that we shouldn't have prices or money, but given that neither actually reflects value - does not reflect it either accurately or precisely - it is rather dangerous to encourage an illusion otherwise. That wouldn't be like an illusion in the movie theater, where you can forget you're watching a movie but five minutes later walk out, step into your car, and drive away, no crazier than before. When we believe money truly reflects value, some truly horrible things happen: children starve, diseases aren't treated, people freeze sleeping on the street, etc.