To the question:
I get 7 tr, still remains for gadgets, tastes and interests. ...

Who wrote interestingly? ... at 7000 to live unbearable even a pensioner, what more "gadgets"?

There is a big difference between you, not in your level of life, but in your opinion about your level of life. This is best seen in the basket of products that you carry on the box. I assume that in the basket of the first writer will be: pasta, cereals, bread, mayonnaise, ice cream meat, onions, potatoes, carrots, etc.
But the basket of the second will also contain: yogurts, sausages, semi-finished products, sausages, hard and melted cheeses, juices, ice cream, steamed meat, various cooking, etc.
The first attributes such products to tastes for which there is money or not. This is considered to be the norm of nutrition.
I myself lived in Moscow and my parents all included, and for 2000 a month, there was a period, I know what I am talking about.
It is not easy to live without yogurt.

Aunt Sarah, how do you get such a delicious meal?
It’s easy, don’t eat meat.