If wealth is: worry-less sleeping, clear conscience, reciprocal gratitude, absence of envy, good appetite, muscle strength, frequent laughs, no meals alone, no gym class, some physical labor/hobby, good bowel movements, no meeting rooms, periodic surprises, no NYT, then it is largely subtractive (elimination of iatrogenics). It may seem bland but I see more of it in economy class than in front of the plane.