Try the trade honestly. Not their salary or their face, their entire life, including the family, the health, the private worry they have never mentioned to anyone. Almost nobody accepts once the package is complete.
That reluctance is worth taking seriously. It isn't smugness. It is a quiet recognition that you are attached to your own particular history, even the parts you would happily have skipped.
Envy works by extracting a single line item and pricing it alone. Taken whole, most lives turn out to be surprisingly hard to give up. Including this one, on a fairly average day.