So, money is a representation of utility. Representations of utilities don't have to be "linear in utility". I already said "obviously not the utility of people", so whether people value money for its own sake doesn't seem very relevant.

Perhaps a better point of comparison for money would be with utility-related signals in the brain - such as dopamine.

I don't like having to say "representation of utility". Representations are all we have. There is no utility apart from representations.