Well, two questions...
1) Is his income not luxury high, but he is in a career he loves? Does he have the potential to advance through that career over time and make more money?
2) Is his income not luxury high because his work ethic has placed him permanently in a lower tax bracket?
Because if you are serious, I think that's the thing you are weighing. You are still young and so is he.
I am certainly not in a luxury tax bracket, and it's really only been in the last year or so that I have been able to dig myself out of some holes financially, but I am in a career I love and once I complete my doctorate I will be in a position to move forward and make considerably more than I make now. However, I am a teacher. I am likely to always shop at TJ Maxx over higher end stores. I will have student loan debt to pay back the rest of my life, which will always effect my credit score. Not a flashy life, but a content one.