I make 250k, and I'm actually tempted now to book that business class flight to Paris - I expected it to cost a lot more. I would not spend 1.5k/night on a hotel because I'm sure I can find a good one for 1/3 of that. So it's not entirely hypothetical for me. If my salary doubles, this becomes a much easier decision. But I don't go on long distance vacations often, so when I do it's easier to justify the costs.