Though I WILL add - and this is partly due to where I live (CA, high housing costs), and the people I know (middle and upper middle class folks), but there's a lot of spending.
Spending on travel.
Spending on concerts.
Spending on eating out.
I've got friends who eat out multiple times a week, and think nothing of dropping $50 for two or $100 for four.
I've got friends who talk about how they love concerts, but now are priced out because:
$250+ for two tickets, $75 for babysitting, plus dinner out, drinks, and Uber/Lyft, that's a $500 evening!
(Well, if you want the whole experience ... yes ... but you maybe aren't gonna to that many. We aren't so into concerts, but the one concert we bought tix for, we got the very back row, so $75 each. We had one drink. We ate dinner at home. We parked a few blocks away for free. We paid a sitter. But the other 2 concerts we went to were even cheaper. Neighbor has season tix, gave them to us, I bought him some treats from Costco in exchange. By then our kids were old enough to not need a sitter.)
I've got other friends who just LOVE travel. Now, they may be hacking, but I'm guessing most aren't. I'm talking about multiple international trips a year. 1 - 2 weeks at a time, in addition to weekend jaunts to go skiing in Aspen or to NYC to see a show.
I think in many cases, there's the idea that by now we are old enough to deserve it, so why not!