I am in a long marriage,we each have our own money and joint account money. We are both in the same team and can spend our own money. Each person has the same percentage of take-home to spend as an individual.
This is just you having "extra" money. I guess it's a demographic thing but do you (and everyone else) not understand that over 50% of people (in the US at least) don't have "extra" money. The money they make is already allocated before it's made, any sort of "extra" spending goes on a credit card or forces some other payment to be not made on time, often incurring fees. In some cases that money would deplete a small savings balance.
This is pre-covid numbers but 69% of Americans have less than $1000 in savings. 45% have no savings, and roughly 30% spend more than they make each month, accumulating and juggling credit card balances / short term loans.
I'm from a poor area in the US and most people have $0 "extra" money. As an example my high school 10 year reunion was a few years ago and the target goal was $20. Even with a year's notice most people said that would be too expensive and they wouldn't have it. ($40 per couple).
We had multiple fundraisers to try and get everyone to participate. The fundraisers were everyone buying extra chicken wings with their food stamp cards and giving it to a local restaurant that cooks them and sells fundraiser plates and a car wash sponsored by the bowling alley that gives a free game to anyone who gets a $5 car wash.
How long can you continue to spend more each month than you make?
I don't fully trust that story. Maybe many of the people who have "no savings" have a mortgage to pay off? Technically they have a debt and all spare money goes to the bank, but really they own a house that is worth more than the debt?
In such cases I'd say it is more of a mindset issue.
Work for us, may not work for others.