So a lot of the time you see millionaires and billionairs on shows trying to guess the cost of stuff and going majorly out with their guesses (either two high or too low or it's just an arbitrary guess). But from what I've noticed, most people don't keep track of how much money they have, how much they're spending and how much they need...
Personally, this is something I don't look at often (I could tell you the price of a lot of things in a supermarket but I don't go as far as to plot my outgoings and ingoings and try to follow a 3:2:1 methadology or similar (also known as a 50:30:20)) - I'm quite a minimalist financially though to a comfortable extent.
Is the idea behind money that same as most things, you don't realise it's there until it isn't... Even if you're on a wage, you can't say you check all of your accounts on a daily basis and convert them to fiat (unless you waste a lot of time doing that).
When I was working a wage job for years, I noticed no matter how much money I made, my spending would always gravitate towards my whole paycheck unless I consciously implemented some rule like 50/30/20. There's something about a regular paycheck that really feeds into that mentality. Paycheck stability and big credit lines have definitely helped create this "no savings, spend everything, pay later" culture.