My figures from your list:
Fuel 100 (over 2 cars)
Insurances 100 (house, life and car)
Service and parts 20 (both cars)
Tax 30
Tel./Inet/HiFi/Xbox/TV 40
Clothes & Food (Not sure on this, she does the shopping)
Garage (part of the house)
Mortgage 300
Entertainment (Not sure what you class as this.)
Mobilephone 0
Vacations (Varies)
Health insurance 0 (NHS still seems ok)
Gym 0 (Get plenty of exercise at work and home)
This is approx as we don't live month to month. If the car needs petrol we fill it up. Christmas is once a year and we buy stuff at the time, cost varies from year to year. Same as vacations, we don't have set intervals between vacations, if we feel like going away we do. I fix my own cars. My mortgage is low because I could not afford a high one. I bought my first house when I was 18 when prices were good. I moved at the right times and now have a 200k house for £300 a month. I'd never afford stuff if I wasn't careful with what I do have.
My parents brought me up to believe it's not how much you earn, it's what you do with it that counts.
So that's how I manage to live on under half the original figure posted. If you do earn lots of money then maybe you don't have to be so careful and can pay for people to do stuff for you. Maybe you don't have to shop around for the best deals and stuff.
I'd love to have more cash, but I have enough to live on, a beautiful wife and daughter, I'm in good health, and I have a TT6 Supra. That's all I need.