A) the wage would be different but so would the cost of living so presumably she was making the equivalent of the average wage then which would go (at least) as far as it does now. B) my comment was in response to someone who seemed to be disputing that Amy was struggling financially (in response to someone who thought that was unrealistic given what nurses make) so I was pointing out that the film shows she was struggling financially (presumably for all the reasons you point out).