I don't actually believe most of the posters on this thread know the first thing about their neighbours' and acquaintances' finances or would be in a position to know what their means are. I know roughly which of my friends earn loads vs not loads but I couldn't guess a particular figure (nor am I especially interested). I also don't keep track of what they (seem to) spend money on, and I think it's very creepy if you do. And obviously from side hustles to inheritances there are many ways in which someone might seem to be spending more than they earn, but are actually well within their means.
So I judge everyone who thinks they know (and indeed everyone who cares) about their friends' finances much more than I judge anyone for spending money.
Personally I live below my means. I had a bad credit card experience when I was at uni and once that was paid off swore I'd never use one again (which nearly came back to bite me when it came to buying a house, but that's by the by). Then I was just very poorly paid when starting my career so I had to learn to live frugally - which gave me a lot of healthy money-saving habits that I've deliberately not broken even as I've earned more.
When I was broke in my 20s I had a lot of luxury experiences so people who looked at my social media might have thought I was living beyond my means. It was all free.
I don't think I'm naturally good at budgeting or shopping around for the best interest rates etc but I don't really enjoy spending money at all. I don't get the whole "you must consume, consume, consume shiny new things in order to make the grind of life worthwhile" perspective at all. I have one or two luxuries that I genuinely love, and now I have money I'll indulge them (eg fancy restaurants), but stuff like flash cars, constant home renovations or even the whole concept of shopping as leisure/therapy... nah. The nature of capitalism is to create false demand and I'm not having it. For the most part the things that bring me happiness don't actually cost much (another lesson learned from my years of being broke, when I couldn't buy shit but still managed to be pretty joyful).
Do people really have a "keeping up with the Joneses" mindset? I don't think I know anyone who does, at least they haven't said it out loud to me. I would think anyone who did have it was fairly idiotic.