Some of the people you see will be living on credit cards. There were lots of longish 0% deals at one point. They can be used for finance, I knew a few people who bought really nice cars of finance.
My DH and I had a phase where we 0% used credit cards - we had a few good holidays in that time - but are now panicking about some that aren’t going to be paid off in time so have upped the payments and are really feeling the pinch on that and rising costs generally.
People we don’t know well wouldn’t know that though, you don’t know how people have paid for holidays or anything else.
We also have a generous MIL who has previously paid for a family holiday for us.
Also, on the holiday front, you don’t really know what families are paying (unless you are off to the Maldives or similar!)
There seems to be a misconception that holidaying in the UK is always a cheaper option that going abroad.
However, a family of 5 - using a free child place - can go to a nice little all inclusive in somewhere like Turkey in Greece for as little as £400 per person, or less depending on taking DC out of school at cheaper times. And not spend a penny on top of that while there as transfers and activities and all food and drinks included. I know this is still expensive in relative terms but some seem to assume that those holidays are more high end than they actually are.
To take a family of 5 away in the UK, taking into account the cost of accommodation somewhere like Cornwall, supermarket food, local attractions, ice creams for the kids.. there is no way I would pay for that during school holidays.
We also looked at Butlins a few years ago, in August, and it would have cost the same as going abroad, with a food package that wasn’t even all inclusive.
It is hard with young DC and trying to work, it really is. I am able to work from home now though, around the kids as I can just tell them “I’m in meeting upstairs, don’t come in unless there is an emergency” and it’s self employed work so I pick the hours that suit me and can take on extra work as needed.
If you didn’t know us well though, from the outside it might look as if I don’t work at all, as I am at school events, sometimes doing school run and always look scruffy so am clearly not heading off to an office.