And its probably more about stability than an absolute rich/poor number. I see plenty of people throwing money away and then complain about never having any money.
Some monthly expenses I see - £250 on multiple food deliveries a week. £400 to constantly have a new car when the car they drove 3 cars ago is still working fine, while only commuting 2km to work. £80 on a phone.
Stop doing that for 18 months and you have a pretty good house deposit in most of the country.