Op if you mean how can people that you percieve as similar earnings to you afford it?
As obviously there are mega rich people who can.
My anecdotal evidence. Average earner , single Mum.
To the outside world I probably look like I have spent a lot on holidays but I haven't.
For the past three years we have had a European city break with my dd and my boyfriend and I have a holiday together.
We live with my parents so rent is low. I bleach my own hair, I never cut my hair ( oh trimmed the ends at Christmas). I take lunch to work. Myself and my dd don't actually eat a lot and we share with my parents who don't either. I also have no childcare costs as my parents are great.
This in contrast to my boss who earns 3 times me. He has wrap a round care costs x3. Drinks naice wine every few nights. He brings in daily m and s grapes. He says his shopping bill is £200 a week. He had a day off the other week. His wife bought him the lady bird book " sick note" I think that was £6.99 for a quick laugh.
He can afford holidays though I am sure but my point is as a lot have said on this thread it is in some cases where people choose to spend their money.
For my Euro city break. I book budget airlines early. Usually go mon- fri. This summer we got £300 for three return to Denmark. The hotel was more expensive but I like nice hotels but we could have gone cheaper. The whole holiday for three cost me about 1k.
Then when my dd goes away with her Dad we are going on a three stop 9 days across the USA. I book things individually. I think one USA domestic flight cost £40. I got Norweign airline tickets for £350. The whole trip cost me £1.5k . Oh paid the same. So 3k for both.
So I have spent 2.5k on holidays ( obviously plus spends) but it looks a lot more. Now I know some people don't even have 2k but I am lucky due to no childcare costs and I have some maintenance from my ex. I could afford it if I had a mortgage too as I save that every month.
So for an earner like me. I guess its housing costs, childcare and extras. That simple I suppose.