I earn quite a bit more than DP, but after tax, it's not quite double. I have a very stressful job and I'm not sure it's for ever.
My big goal is to save money for the future/freedom from such a high stress role. DP loves his job so doesn't see it in the same way.
But whenever we buy something he will joke "but you earn good money so you can treat me to nice things" which I know is only a half joke.
For example, if we were going to go out for a Chinese sit down on a Friday, there is a nice one that would cost £60 total and a fancy one that would cost £100 for a meal. He'll always want to go to the fancy one and joke that I could treat him.
or if we are going on holiday, I'll find a basic but nice hotel for say £100 a night and he'll want us to stay at the 5* for £200 a night.