More about having your cake and eating it ! As an 18 year old, I put my money away, I didn't learn to drive in my teens and never bought a car, I was careful with money, I neither smoked, drunk to excess or went on holidays or nightclubs. BUT, I bought my house at 25, I retired at 55 with early 55 pensions and rental incomes.
Life is about priorities. You want to enjoy - and waste - your money as a youngster that's up to you, just don't moan about it later.
Can anyone confirm that this is based on someone NOT still living at home ? 15,000 a month as a graduate living at home would be an OK salary