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).
I too don't check on what was left of my money, I don't have any budgeting going on and I don't plan ahead with what I spend but surprisingly I always have money left in cases where I need it even by the end of the month. I guess it is always about your habit in spending or your daily routine on how you spend things that makes you comfortable on not thinking ahead or plan what your will spend. Of course for me when I want to spend something new like buying a car that will just make me plan ahead on how I will adjust my earnings and savings for that car. However I couldn't say the same thing for some people who are living on a tight budget where every penny they spend counts, these types of situation is where people need to always adjust depending on their wage/earnings.