I think people are being really pedantic about the term wealthy.
If you earn 85K and your partner earns 20-30k you are wealthy, rich, well off whatever imo. You have money, even if you spend it all, because you don't just spend money and it goes no where. You get things for it, so a high mortgage means a nice house. You have great holidays, or a nice car. All the 'outgoings' people have suggested that would eat up that salary are pretty much all luxuries bar childcare. They are still enjoying a life with lots in it which someone earning less than them cannot have.
Imo private school fees are irrelevant, if you can even consider private education in my book you are wealthy and it's pretty sickening that there a people on here are counting it as an 'outgoing' and therefore making you not wealthy.
Wealth isn't just money it's everything about your life. There's no point being wealthy and not spending the money because you d have a shit life, what's the point? If you've earnt 85k but had a year living in a nice house, had two holidays, eaten well, sent your kids to private school then you are bloody wealthy even of you have no money to spend on yourself at the end because you've had a year filled with things.
Me and dps a joint income is about similar and I feel pretty well off, I'm not rolling in it of course but Im not going to sit here and pretend we're not well off because we've spent most of our money on good things! (We havent actually we've saved but still had plenty of good things).
We obviously can't afford a Ferrari and designer clothes but we live in a decent house, can put the heating on when we want, eat mostly what we want, go on holiday to somewhere nice, have a couple of weekends away. Our life is good.