So many variables that it's impossible to come to a figure that works for everyone as where they live and how they live will be the main factors. I have earned London money for 20 plus years in the main but I have lived in the Midlands all my life and we are a double income no kids household. I was earning in to 6 figures in my late 20's early 30's and I am now 50 and I have been there most of the time since,well there on a few years. Like most people who earn well (as opposed to those I would call wealthy) I have managed to spend my money without too much trouble. Be it property, cars, holidays, watches, toys, tech or clothes, it tends to get spent without too much trouble. We have several grand left each month even on a bad month but we still manage to spend it, sometimes on frivolous stuff, sometimes on house/home and sometimes on holidays/clothes/weekends away.
Then I can have a high 5 figure month (even a 6 on a couple of occasions) and that is fantastic but it still tends to go somehow. I think when you earn 30K you look at that and often can't comprehend how, but when you are more accustomed to it then it's not too difficult. I spent over 3K on the Goodwood Revival, 10K on the East Coast US holiday, £15K West Coast because we did it as a life experience we could talk about and enjoy, because we can and don't have school fees! I bought some cars, some watches and soon it goes. I have spent 5K on clothes in the last year (I lost weight), 8K on HiFi and then god knows how much on crap from Amazon because I wanted to spend. Then add the house repairs and it's gone and I am looking for my next wage drop.
I could have died in January, I also found out I have a VERY rare immune disorder that if not managed will kill me, so my outlook has changed somewhat and why I am talking about money on here, something I have actually not done that often.

One life, enjoy it people.