Most people live off their 'disposable' income, whether that's £100k or £100 (or less).
We live within our budget, carefully planned for each month. We're not loaded but we're not on the breadline either thankfully.
DH has his own business, DS has complex SN, which requires me to be his full-time carer, and our DD is at the local state Academy. I don't work because of DS and also because I am disabled also. So I guess that I'm living off the state, especially as I have a 'free' car. 
We've both been in the financial shit individually in the past but clawed our way out of the mess, and now budget for as much as we can, not having a crystal ball and all! We try to go on holiday in the UK each year, we don't eat out often if at all due to the lack of support (no family nearby to help with babysitting etc) for DS and myself.
But, when we can, we do treat ourselves to a nice take-away, bottle of something lush etc.... we make time for each other and our children.
Whoovian - I, like others, don't understand why you posted and what you wanted to hear.
I do think you need to start saving some of the £42k each month. We don't have a lot but we'd be able to get the boiler fixed should it break.
I get the impression that this is more than about money.... you have the status but what about the emotional side of things, emotional security as Pacific says?
What's missing? Why do you feel there's a gap in your life.
Clearly the saying money can't buy happiness is very true in your case 